I'm going to be totally honest here: After reading the first book in this series, I wasn't sure I was going to like the sequel. Starshine was a decent book, but I had some major misgivings with certain aspects of the writing and wasn't sure it was really my cup of tea. Despite that, the story and main characters were compelling enough that I wanted to keep reading, so I bought Vertigo. I'm so glad that I did, because within twenty pages, G.S. Jennsen converted this reluctant reader into a die-hard fan.
The story hooks you from the first page, and before I knew it, I was completely immersed in Jennsen's universe. New questions are raised as fast as old ones are answered, which made me eager to keep reading and find out more. The action will keep you on the edge of your seat wondering what happens next. Many of the characters we met in the first book appear again here, but they each seem to have a much more distinctive voice and role in the story, which makes it easier to keep track of them all. The continued development of certain secondary characters from the first book is especially good here, and I particularly loved how Jennsen wrote Miriam Solovy's character in this book. I didn't really care for her in Starshine and felt very detached from her, but that completely turned around here in Vertigo as we see her open up more and become a major driving force in the larger events of the story. She's easily one of my favorite characters in the story at this point. The author's take on invading aliens was interesting and unique. More importantly, I found their motives and reasoning believable, which is something I always have an issue with in stories like this. Overall, I was very impressed by this book and the way Jennsen seems to have improved from the first one. If you're anything like me, the last few paragraphs of Vertigo will leave you eagerly awaiting the next book in the series.