Fiction:
Valhala, by Robert Mrazek
Origin, by Jessica Khoury
Neanderthal, by John Darnton
The Hanging Judge, by Michael Ponsor

Non-fiction:
Lost City of the Monkey God, by Douglas Preston
Bigfoot, Yeti, and the Last Neanderthal, by Bryan Sykes

It would help if you gave a clue as to types you prefer. I'll jump in if you do.

Voice of the planet.

Here's some of my favorites. I like to re-read books and all of these are on my re-read list. With regard to science:
Feynman's Six Easy Pieces. Genius by James Gleick (a biography of Feynman), Chaos also by Gleick in which he breaks down chaos theory, In Search of Schrodinger's Cat by John Gribbin (WHAT'S IN THE BOX!), A Brief History of Time by Hawking, Mary Roach's Bonk : The Curious Coupling of Science and Sex and Stiff: The Curious Lives of Human Cadavers. She has others I haven't read but I will be reading them, she's great. Come as You Are: The Surprising New Science That Will Transform Your Sex Life by Emily Nagoski. I'll be giving a copy of this to my younger kids. I'm currently reading Why We Sleep: Unlocking the Power of Sleep and Dreams. Given my issues with sleep it's terrifying.

Fiction...god. The Brothers Karamazov by Dostoevsky, Two Years Eight Months and Twenty-Eight Nights, and The Satanic Verses by Salman Rushdie,
The Saga of the Pliocene Exile series by Julian May, it starts with The Many Colored Land. This is one of my very favorite series of books and it holds up so well. I re-read it every few years. My oldest son picked it up a few years ago and between the two of us we've worn it out.
Hank Green's Turtles All The Way Down. So many. Of course anything by Heinlein, Frank Herbert, Roger Zelazny,

I read the entire Harry Potter series aloud to my kids. The first two kids heard most of it twice because I read it to my second two kids as well (second marriage). Other great titles to read aloud or at least ones that met with the approval of my kids include The Evolution of Calpurnia Tate by Jacqueline Kelly, Wonder by R. J. Palacio, Counting by 7s by Holly Goldberg Sloan, The Golden Compass: His Dark Materials trilogy by Pullman.

Non-fiction: An Indigenous People's History of the United States by Roxanne Dunbar-Ortiz. this will make you question you've ever been taught in a history class, at least the classes here in the states anyway. God Is Not Great by Christopher Hitchens. Do yourself a favor and get the audio version as it's read by the author. Hitchen's command of the English language is humbling. I miss his voice. While your at it get Hitch-22, his autobiography, also read by the author.

If you want to check out the world of meditation and mindfulness I got started with 10% Happier by Dan Harris, his personal route to embracing a meditation/mindfulness practice where he starts as an anxiety ridden skeptic looking for answers as to why he had a full blown panic attack while on the air on ABC. Then Sam Harris, Waking up. This books a trip, he gets into the neuroscience behind it but it also covers his personal journey. Then Wherever You Go, There You Are by Jon Kabat-Zinn. This is meditation gold imho. He's on an episode of Dan Harris podcast, I'd highly recommend that.

My god, that was a little much. I blame sleep deprivation.

bible, king james edition.

War Against The Weak: Eugenics and America's Campaign to Create a Master Race by Edwin Black, The Working Poor: Invisible in America by David K. Shipler, Lies and the Lying Liars Who Tell Them by Al Franken, When Will Jesus Bring The Porkchops by George Carlin, New Rules by Bill Maher and Sugar Blues by William Dufty just to name a few. Don't hold it against me, but I've also read Leadership by Rudolph Giuliani and Who's Looking Out For You? by Bill O'Reilly Lol

Right now I have a backlog of Entertainment Weekly to get through (won a free subscription) and last months American Songwriter Magazine to still read. I also bought Billy Joel: The Definitive Biography by Fred Schruers a few months ago and I still haven't started reading it yet.

My Kindle library has hundreds of books, many of which I reread regularly, plus I keep buying more. Love sci-fi such as Robert A. Heinlein, John Scalzi, and Joe Haldeman, etc., nonfiction memoirs and autobiographies, especially by those in the LGBTQ community, and people who grew up abroad, famous people I admire, Native American captive accounts, slave narrative accounts, etc.

My current favorite indie books are the Catskinner series by Misha Burnett.
Here's a link to the first book, in amazon:
[amazon.com]

Anything and everything by Terry Pratchett or Neil Gaiman.

also the young lions by shaw for a look at protestant bigotry and the hopelessness of war

Anything from Robert G. Ingersoll is good.

The Wasp Factory by Ian Banks is a very good and compelling psychological horror.

House of Leaves by Mark Danielewski is a book I can't even begin to describe properly, but it's fiction, us unlike any book I've ever read or heard of, and really tries to challenge the very form of contemporary literature (it's only available as hard copy, it just would not work as an ebook).

John Does at the End by David Wong is a humorous book about the paranormal, Wong was a staff writer on the X-Files, and this book definitely influenced Stranger Things in many ways.

The Art Of Selfishness by David Seabury -- Best book ever written, saved my life.

Read the gulag archipelago by Aleksandr Solzhenitsyn, its a great personal journey that will teach you a lot about who you are.

I'm a big Kurt Vonnegut fan. If you haven't read any or much of his stuff I highly recommend The Seirens of Titan as a jumping off point. If you're a fan of the Song of Ice and Fire series, Knight of the Seven Kingdoms is a great, light hearted (comparatively) easy read. If you're interested in American history the Federalist Papers are an interesting read.

Do you mean fiction, non-fiction, centered on atheism, or anything and everything?

I’m about to read Lamb by Christopher Moore for the second time. It’s hilarious. And especially irreverent.

Ayn Rand "Capitalism: The Unknown Ideal"--collected essays of leading economists
Robert Ardrey: "The Social Contract"---"a personal inquiry into the evolutionary sources of order and disorder.
Hamilton, Madison, Jay: "The Federalist Papers"
T.A. Heppenneimer: "Colonies In Space: Take an expedition to dream cities in the stars"
Norman Mailer: "Cannibals and Christians"
Karl Von Clausewitz: "War, Politics, and Power"
Gilbert Highet: "Man's Unconquerable Mind"