| 1 |
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Project Hail Mary
by
4.51 avg rating — 1,902,169 ratings
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| 2 |
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The Hitchhiker's Guide to the Galaxy (Hitchhiker's Guide to the Galaxy, #1)
by
4.22 avg rating — 2,082,576 ratings
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| 3 |
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All Systems Red (The Murderbot Diaries, #1)
by
4.10 avg rating — 413,760 ratings
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| 4 |
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The Stars Too Fondly
by
3.73 avg rating — 3,744 ratings
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| 5 |
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2001: A Space Odyssey (Space Odyssey, #1)
by
4.18 avg rating — 344,860 ratings
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| 6 |
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Dune (Dune, #1)
by
4.29 avg rating — 1,717,223 ratings
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| 7 |
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Illuminae (The Illuminae Files, #1)
by
4.23 avg rating — 164,849 ratings
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| 8 |
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The Martian
by
4.42 avg rating — 1,387,606 ratings
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| 9 |
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A Brief History of Time
by
4.21 avg rating — 494,912 ratings
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| 10 |
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Space Case (Moon Base Alpha, #1)
by
4.27 avg rating — 16,063 ratings
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| 11 |
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Orbital
by
3.47 avg rating — 173,047 ratings
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| 12 |
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The Stardust Grail
by
3.67 avg rating — 11,932 ratings
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| 12 |
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Endurance: A Year in Space, A Lifetime of Discovery
by
4.21 avg rating — 23,607 ratings
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| 12 |
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Cytonic (Skyward, #3)
by
4.05 avg rating — 71,249 ratings
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| 12 |
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Alien: Out of the Shadows (Canonical Alien trilogy, #1)
by
3.82 avg rating — 13,280 ratings
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| 12 |
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On Basilisk Station (Honor Harrington, #1)
by
4.14 avg rating — 49,568 ratings
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| 12 |
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Ask an Astronaut
by
4.17 avg rating — 2,978 ratings
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| 12 |
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Beautiful Star
by
3.16 avg rating — 2,681 ratings
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| 19 |
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To Sleep in a Sea of Stars (Fractalverse, #1)
by
3.80 avg rating — 73,916 ratings
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| 19 |
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Brothers in Arms (Vorkosigan Saga, #5)
by
4.20 avg rating — 19,885 ratings
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| 19 |
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Aliens: Bishop
by
3.96 avg rating — 1,141 ratings
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| 19 |
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Gemina (The Illuminae Files, #2)
by
4.43 avg rating — 83,162 ratings
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| 23 |
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The Darkest Dark
by
4.28 avg rating — 2,745 ratings
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| 23 |
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Astrophysics for People in a Hurry
by
4.08 avg rating — 217,743 ratings
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| 23 |
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The Warrior's Apprentice (Vorkosigan Saga, #2)
by
4.26 avg rating — 31,211 ratings
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| 23 |
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Sleeping Giants (Themis Files, #1)
by
3.82 avg rating — 100,053 ratings
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| 23 |
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Obsidio (The Illuminae Files, #3)
by
4.44 avg rating — 59,311 ratings
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| 28 |
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Packing for Mars: The Curious Science of Life in the Void
by
3.95 avg rating — 61,564 ratings
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| 28 |
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Barrayar (Vorkosigan Saga, #7)
by
4.30 avg rating — 31,621 ratings
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| 30 |
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Gideon the Ninth (The Locked Tomb, #1)
by
4.17 avg rating — 198,956 ratings
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| 30 |
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Shards of Honor (Vorkosigan Saga, #1)
by
4.06 avg rating — 41,615 ratings
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| 32 |
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The Last Gifts of the Universe
by
3.72 avg rating — 4,586 ratings
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| 33 |
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Qualify (The Atlantis Grail, #1)
by
4.15 avg rating — 9,461 ratings
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| 34 |
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Spacemanatee!
by
4.09 avg rating — 67 ratings
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| 35 |
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The Disordered Cosmos: A Journey into Dark Matter, Spacetime, and Dreams Deferred
by
4.09 avg rating — 4,379 ratings
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| 36 |
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Linesman (Linesman, #1)
by
4.03 avg rating — 3,448 ratings
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| 37 |
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Binky the Space Cat
by
4.08 avg rating — 5,323 ratings
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| 38 |
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Crossways (Psi-Tech, #2)
by
3.94 avg rating — 145 ratings
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| 39 |
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Space Opera (Space Opera, #1)
by
3.45 avg rating — 17,569 ratings
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| 40 |
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The Twice and Future Caesar (Tour of the Merrimack, #6)
by
4.07 avg rating — 159 ratings
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| 41 |
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The Space Between Worlds (The Space Between Worlds, #1)
by
3.92 avg rating — 47,663 ratings
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| 42 |
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Lightless (Lightless, #1)
by
3.45 avg rating — 2,845 ratings
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| 43 |
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Doctor Who: The Resurrection Casket
by
3.83 avg rating — 3,742 ratings
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| 44 |
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We Dream of Space
by
4.11 avg rating — 9,258 ratings
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| 45 |
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Star Splitter
by
3.79 avg rating — 3,063 ratings
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| 46 |
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Interesting Facts about Space
by
3.87 avg rating — 38,777 ratings
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| 47 |
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The Sirens of Titan
by
4.15 avg rating — 164,643 ratings
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| 48 |
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Big Damn Hero (Firefly, #1)
by
3.82 avg rating — 8,572 ratings
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| 49 |
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An Astronaut's Guide to Life on Earth
by
4.17 avg rating — 64,333 ratings
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| 50 |
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Across the Universe (Across the Universe, #1)
by
3.77 avg rating — 119,737 ratings
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| 51 |
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The Six: The Untold Story of America's First Women Astronauts
by
4.33 avg rating — 8,658 ratings
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| 52 |
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The Calculating Stars (Lady Astronaut Universe, #1)
by
3.95 avg rating — 39,419 ratings
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| 53 |
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Out of Orbit: The Incredible True Story of Three Astronauts Who Were Hundreds of Miles Above Earth When They Lost Their Ride Home
by
3.83 avg rating — 712 ratings
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| 54 |
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The Fated Sky (Lady Astronaut Universe, #2)
by
4.26 avg rating — 16,119 ratings
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| 55 |
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Providence
by
3.85 avg rating — 7,133 ratings
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| 56 |
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Don't Panic: Douglas Adams & The Hitchhiker's Guide to the Galaxy
by
4.28 avg rating — 25,456 ratings
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| 57 |
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The Abyss Beyond Dreams (Chronicle of the Fallers #1)
by
4.21 avg rating — 14,524 ratings
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| 58 |
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I'm Waiting for You and Other Stories
by
3.69 avg rating — 2,418 ratings
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| 59 |
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Holdout
by
3.60 avg rating — 1,442 ratings
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| 60 |
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Ender's Game (Ender's Saga, #1)
by
4.31 avg rating — 1,506,790 ratings
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| 61 |
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Critical Mass (Delta-v, #2)
by
4.18 avg rating — 5,104 ratings
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| 62 |
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Ice Planet Barbarians (Ice Planet Barbarians, #1)
by
3.61 avg rating — 223,590 ratings
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| 63 |
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Intergalactic P.S. 3
by
2.98 avg rating — 270 ratings
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| 64 |
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Acorna: The Unicorn Girl (Acorna, #1)
by
3.73 avg rating — 11,097 ratings
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| 65 |
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Black Panther, Vol. 6: The Intergalactic Empire of Wakanda, Part One
by
3.90 avg rating — 894 ratings
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| 66 |
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Hold (Hold, #1)
by
3.76 avg rating — 13,803 ratings
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| 67 |
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Finn and the Intergalactic Lunchbox (The Finniverse Series, #1)
by
3.88 avg rating — 328 ratings
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| 68 |
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Intergalactic Exterminators, Inc
by
3.74 avg rating — 1,092 ratings
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| 69 |
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Fractal Noise (Fractalverse, #0)
by
3.43 avg rating — 16,586 ratings
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| 70 |
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Nanny for the Alien King (Intergalactic Fated Mates #1)
by
3.84 avg rating — 1,770 ratings
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| 71 |
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The Green Lantern, Vol. 1: Intergalactic Lawman
by
3.59 avg rating — 1,555 ratings
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| 72 |
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Orson Scott Card's InterGalactic Medicine Show: An Anthology
by
3.95 avg rating — 2,342 ratings
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| 73 |
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Leviathan Wakes
by
4.31 avg rating — 340,706 ratings
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| 74 |
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Intergalactic Gas (The Bad Guys #5)
by
4.37 avg rating — 6,021 ratings
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| 75 |
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The Long Way to a Small, Angry Planet (Wayfarers, #1)
by
4.16 avg rating — 198,718 ratings
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| 76 |
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A Memory Called Empire (Teixcalaan, #1)
by
4.10 avg rating — 77,965 ratings
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| 77 |
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The Woman Who Thought She Was a Planet and Other Stories
by
3.90 avg rating — 300 ratings
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| 78 |
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We Are Legion (We Are Bob) (Bobiverse, #1)
by
4.24 avg rating — 147,398 ratings
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| 79 |
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Weirdos from Another Planet! (Calvin and Hobbes, #4)
by
4.65 avg rating — 14,389 ratings
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| 80 |
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Hidden Figures
by
3.96 avg rating — 116,931 ratings
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| 81 |
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Earth! My First 4.54 Billion Years
by
4.35 avg rating — 1,586 ratings
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| 82 |
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Old Man's War (Old Man's War, #1)
by
4.23 avg rating — 235,193 ratings
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| 83 |
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Death by Black Hole: And Other Cosmic Quandaries
by
4.10 avg rating — 32,932 ratings
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| 84 |
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Pale Blue Dot: A Vision of the Human Future in Space
by
4.33 avg rating — 40,976 ratings
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| 85 |
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Starry Messenger: Cosmic Perspectives on Civilization
by
4.11 avg rating — 16,719 ratings
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| 86 |
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Skyward (Skyward, #1)
by
4.46 avg rating — 174,799 ratings
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| 87 |
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Origins: Fourteen Billion Years of Cosmic Evolution
by
4.15 avg rating — 11,073 ratings
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| 88 |
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These Broken Stars (Starbound, #1)
by
3.89 avg rating — 72,116 ratings
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| 89 |
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Letters from an Astrophysicist
by
4.06 avg rating — 9,208 ratings
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| 90 |
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Artemis
by
3.67 avg rating — 368,661 ratings
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| 91 |
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Aurora Rising (The Aurora Cycle, #1)
by
4.09 avg rating — 76,074 ratings
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| 92 |
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Children of Time (Children of Time, #1)
by
4.30 avg rating — 198,927 ratings
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| 93 |
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Doctor Who: Eleven Doctors, Eleven Stories
by
4.10 avg rating — 2,072 ratings
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| 94 |
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Foundation (Foundation, #1)
by
4.17 avg rating — 617,659 ratings
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| 95 |
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A New Eden (The Betaverse, #1)
by
3.63 avg rating — 372 ratings
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| 96 |
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Mission One (Titan Chronicles, #1)
by
4.13 avg rating — 3,018 ratings
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| 97 |
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Quantum Radio
by
4.07 avg rating — 17,894 ratings
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| 98 |
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Dead Silence
by
3.78 avg rating — 41,419 ratings
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| 99 |
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The 100 (The 100, #1)
by
3.58 avg rating — 90,034 ratings
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| 100 |
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Rendezvous with Rama (Rama, #1)
by
4.12 avg rating — 191,291 ratings
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