Books with bisexuals

[Hannah]

There seem to be very few out there. Any ideas?

[Jessica (Goldenfurpro)]

There's Shallow Graves. The main character is bisexual, though there isn't really any romance in the book.

[MJ]

Rule of Three

[Anna]

https://www.goodreads.com/list/show/4...

https://www.goodreads.com/list/show/7...

https://www.goodreads.com/list/show/7...

[Jessica (Goldenfurpro)]

There's also Half Bad and The Scorpion Rules which feature bisexual love triangles

[Liralen]

Everything Leads to You and It's Our Prom both have bisexual main characters.

[Rainbowheart]

I thought Cut Both Ways was a really good book with a bisexual male MC.

[Lobstergirl, au gratin]

Some Girls

[Michele]

If you don't a bit of fantasy (like magic, not sexual fantasy) A Rational Arrangement

[Anna]

The Vesuvius Club

[Steph (loves water)]

Rita Mae Brown- Six of One, main character is bisexual

[Ingo]

For the click:
Six of One
(Checked for my TBR, no ebook yet!)

[Aquiles]

Torchwood

[Lobstergirl, au gratin]

A Compass Error

[Rosa]

Boyfriends with Girlfriends

[Keith]

-Many of Iain Banks' Culture books touch on bisexuality as a feature of the titular utopian society; e.g. the protagonist of The Player of Games is told by a friend that he's "strange" because he's never had sex with a man or changed physical gender, and at the end of the book he initiates a relationship with someone who's effectively intersex (being in the process of shifting from male to female).
-In Peter F. Hamilton's Pandora's Star and its sequels, at least two main characters are bisexual, a third has a brother in a long-term relationship with a man, a prominent political aide is publically in a relationship with another woman and no-one cares, there's a reference to a planet where all the inhabitants are women, etc.
-In Arthur C. Clarke's Imperial Earth, the main protagonist is bisexual. Similarly, in The Songs Of Distant Earth, bisexuality is considered unremarkable (the male protagonist experiences some degree of attraction to another man as well as engaging in relationships with women, and there's a comedic allusion to another male character engaging in a steamy interlude with "a group of hairy hunks" to "check his calibration").
-Charles Stross' Halting State and its sequel have at least one bisexual character.

[Lobstergirl, au gratin]

I Say a Little Prayer

[Rachel]

Claire DeWitt and the Bohemian Highway, although her love life isn't really the focus of the book.

[Lobstergirl, au gratin]

Trespass has a lesbian couple and a bisexual man. He was married to a woman years before, but now he's in his 60s and attracted to hot 20-something men.

[Ingo]

Ingo wrote: "For the click:
Six of One
(Checked for my TBR, no ebook yet!)"

Forgot this, the ebook was published 2017 (January imho).
Usual ebook retailers.

[[deleted user]]

American Queen
American Prince
American King

[Mandy]

Leah on the Offbeat is YA, the main character is bi.

Soul Breaker is urban fantasy, the main character is openly bi but hocks up with a woman in the book. It is the first in a series so I hope there are both mm and mf relationships.

[RavensScar]

Anita Blake series by Laurell K. Hamilton

[Amy*skye.rhyme]

Laid Bare by Lauren Dane, Trinity by Lauren Dane

Curious by R.G. Alexander, Lux in Shadow by R.G. Alexander

[Lobstergirl, au gratin]

Enigma Variations

[Rosa]

"Reasons Not to Go to Fort Lauderdale," by Liz Clarke, in Slow Hand: Women Writing Erotica.

[Roaming_library]

The Coldest Girl in Coldtown
History Is All You Left Me
Far From You
Grasshopper Jungle
Star-Crossed
The Gentleman's Guide to Vice and Virtue
Pumpkinheads
Red, White & Royal Blue
We Are Okay

Pretty sure all of these have bi characters, although for some they are still questioning (so don't have a label) or don't outright say it (so they might be pan)

[Zev]

"The Boss" series by Abigail Barnette has explicitly bi leads. The first book is a free e-book.

[Lobstergirl, au gratin]

The Sparsholt Affair

[Ingo]

YA:
Simon vs. the Homo Sapiens Agenda (bisexual minor role) - book and movie read/seen, recommended by me, but tame (no sex, no swearing) and the sequel:
Leah on the Offbeat (Bisexual MC), read recommended. Not sure wether it is planned to film this.

Just reading, not sure, how big the role of the bisexual is, maybe minor:
Two Can Keep a Secret
YA-crime, standalone, I think, fast read, short chapters, two MC with POV changing chapterwhise between them.

I think all three books are one way or the other teen-coming-out and coming-of-age-finding-themselves, just so you know what to expect, not really sure, wether they fit what the OP is looking for.

[Kendall]

The Bermudez Triangle.

[Etta.n]

Collected Letters, 1944-1967 if you have any interest in nonfiction

[...cats?]

Lit fic:

Naamah by Sarah Blake - retelling of the story of Noah's Ark, main character is bi

Wonder Boys by Michael Chabon - a major secondary character expresses feelings for a woman and a man

The Mysteries of Pittsburgh by Michael Chabon - the main character has relationships with men and women

Tin Man by Sarah Winman - recounts the main character's major relationships with a man and a woman

Cobalt Blue by Sachin Kundalkar - a brother recounts an affair he had with a nameless man; in the second half of the book, his sister recounts an affair she had with the same man

Brideshead Revisited by Evelyn Waugh - a classic novel about Catholicism and dandies that is widely acknowledged to have very strong bisexual subtext

Genre fic:

River of Teeth by Sarah Gailey - a group of adventurers ride hippopotamuses and plot revenge; several characters are LGBT

The Fire's Stone by Tanya Huff - a prince, a thief and a wizard go on a quest; one of the trio is bi

YA:

Grasshopper Jungle by Andrew Smith - surreal pastiche of Cold War-era horror films with a bisexual lead

Boy Meets Boy by David Levithan - there is a fairly important bi secondary character; the bi representation does feel a little dated, but this was one of the first YA novels with significant LGBT rep

Middle grade:

The Mighty Heart of Sunny St. James by Ashley Herring Blake - a young girl's bi coming of age story

Comics:

The Wicked + The Divine by Kieron Gillen and Jamie McKelvie - pop stars are also reincarnations of gods; basically the entire cast is LGBT, and many are bi

Young Avengers by Kieron Gillen and Jamie McKelvie - almost all of the Young Avengers are LGBT, several are bi

Basically anything by Kieron Gillen tbh

Patsy Walker, a.k.a. Hellcat! by Kate Leth and Brittney Williams - Ian, Patsy's close friend and a major secondary character, is bi and there is significant discussion about this part of his identity

Constantine: The Hellblazer by Ming Doyle, James Tynion IV and Riley Rossmo - there are a lot of Constantine comics, but the Doyle/Tynion run touches on his bisexuality the most

[Lobstergirl, au gratin]

The Transit of Venus

[Lobstergirl, au gratin]

Palimpsest: A Memoir by Gore Vidal

Vidal was a true bisexual. He slept with Anaïs Nin and Jack Kerouac, among hundreds if not thousands of others. Ironically (perhaps) his lifelong companion was a man but they never had sex.

[Lobstergirl, au gratin]

The Story of Harold

[Nora]

The Seven Husbands of Evelyn Hugo
We Are Okay
Echo After Echo
Leah on the Offbeat
Six of Crows (also Crooked Kingdom and King of Scars, all by the same author)
Odd One Out

[Marie]

The Brightsiders by Jen Wilde
Small Change by Roan Parrish
Full Disclosure by Camryn Garrett

[amia]

Sawkill Girls

[Rainbowheart]

Hello, I Lied
Little & Lion
Invisible Life
Vow of Celibacy
Empress of the World
All the Invisible Things
Not Otherwise Specified

[Lobstergirl, au gratin]

Eileen. Probably a borderline suggestion, it's debatable exactly what the sexuality of the protagonist is. A shifting sexuality, maybe.

[Lobstergirl, au gratin]

Exit West possibly. But it doesn't happen until the end of the book.

[Lobstergirl, au gratin]

America Is Not the Heart

[Lobstergirl, au gratin]

After the Monsoon. Series with a male bisexual Swedish police investigator.

[Rainbowheart]

Switch
365 Days
Ramona Blue

[Anna]

This Poison Heart

[nick]

Xeni

[Cynthia]

Paladin's Grace and Paladin's Strength by T. Kingfisher are fantasy books in The Saint of Steel series

[Capn]

The Invisible Life of Addie LaRue by V.E. Schwab has two (very enjoyable read! Very unusual and thought-provoking while staying light enough to entertain).

And I have to state my support for the previously mentioned classic Brideshead Revisited by Evelyn Waugh - this is a gorgeous, tragic book that everyone should read.

The Invisible Life of Addie LaRue
Brideshead Revisited

[Lobstergirl, au gratin]

The Living Sea of Waking Dreams