These are humor / entertainment books that Reddit users like.

Lamb: The Gospel According to Biff,Biff, Christ's Childhood Pal
The Zombie Survival Guide: Complete Protection from the Living Dead by Max Brooks
Be Prepared by Gary Greenberg
Crafting with Cat Hair: Cute Handicrafts to Make with Your Cat by Kaori Tsutaya
Motel of the Mysteries by David Macaulay
The Gospel of the Flying Spaghetti Monster by Bobby Henderson
The Bro Code by Barney Stinson
Unicorns Are Jerks: A Coloring Book Exposing the Cold
Pride and Prejudice and Zombies: The Classic Regency Romance — Now with Ultraviolent Zombie Mayhem! by Jane Austen
Images You Should Not Masturbate To by Graham Johnson
Safe Baby Handling Tips by David Sopp
A Walk in the Woods: Rediscovering America on the Appalachian Trail by Bill Bryson
Go the F**k to Sleep by Adam Mansbach
The Mother Tongue — English And How It Got That Way by Bill Bryson
Rush Limbaugh Is a Big Fat Idiot: And Other Observations by Al Franken
What If?: Serious Scientific Answers to Absurd Hypothetical Questions by Randall Munroe
The Big Coloring Book of Vaginas by
The Baby Owner’s Manual: Operating Instructions
Play Unsafe: How Improvisation Can Change The Way You Roleplay by Graham Walmsley
1984 (Signet Classics) by George Orwell
The Mental Game of Poker: Proven Strategies for Improving Tilt Control
Good Omens: The Nice and Accurate Prophecies of Agnes Nutter
William Shakespeare’s Star Wars by Ian Doescher
Why Do Men Have Nipples? Hundreds of Questions You’d Only Ask a Doctor After Your Third Martini by Mark Leyner
Fight Club: A Novel by Chuck Palahniuk
The Warlizard Chronicles: Adventures with Vodka
The Worst-Case Scenario Survival Handbook by Joshua Piven
I Could Pee on This: And Other Poems by Cats by Francesco Marciuliano
What’s Your Poo Telling You? by Anish Sheth
GatFacts? The Book!: A satire of Firearms Myths by Mr. Morgan Donaho
Jennifer Government by Max Barry
Apathy and Other Small Victories: A Novel by Paul Neilan
The 99 Critical Shots in Pool: Everything You Need to Know to Learn and Master the Game (Other) by Ray Martin
Letters from a Nut by Ted L. Nancy
Sword Coast Adventurer’s Guide (D&D Accessory) by Wizards RPG Team
Aluminum Foil Deflector Beanie: Practical Mind Control Protection for Paranoids by Lyle Zapato
Plato and a Platypus Walk into a Bar . . .: Understanding Philosophy Through Jokes by Thomas Cathcart
Awkward Moments Children’s Bible
I Am America (And So Can You!) by Stephen Colbert
Bobby Fischer Teaches Chess by Bobby Fischer
Stuff White People Like: A Definitive Guide to the Unique Taste of Millions by Christian Lander
Lies: And the Lying Liars Who Tell Them: A Fair and Balanced Look at the Right by Al Franken
You Are Not So Smart: Why You Have Too Many Friends on Facebook
Penis Pokey by Christopher Behrens
Elephants on Acid: And Other Bizarre Experiments (Harvest Original) by Alex Boese
The Sirens of Titan: A Novel by Kurt Vonnegut
Killing Hitler With Praise And Fire: Choose Your Own Horrible History by Matthew Hutchins
My Tank Is Fight! by Zack Parsons
There Are No Electrons: Electronics for Earthlings by Kenn Amdahl
Cat’s Cradle: A Novel by Kurt Vonnegut
A Walk in the Woods: Rediscovering America on the Appalachian Trail (Official Guides to the Appalachian Trail) by Bill Bryson
How to Traumatize Your Children: 7 Proven Methods to Help You Screw Up Your Kids Deliberately and with Skill by
How to Sharpen Pencils: A Practical & Theoretical Treatise on the Artisanal Craft of Pencil Sharpening for Writers
The Caveman’s Pregnancy Companion: A Survival Guide for Expectant Fathers by David Port
Rant: The Oral Biography of Buster Casey by Chuck Palahniuk
Surviving Your Stupid
Idiot America: How Stupidity Became a Virtue in the Land of the Free by Charles P. Pierce
101 Facts You Can’t Prove Aren’t Not True by Jeff Waldman
Across the Nightingale Floor (Tales of the Otori)
Gödel’s Theorem: An Incomplete Guide to Its Use and Abuse by Torkel Franzén
World of Warcraft: Arthas: Rise of the Lich King (World of Warcraft
(Pocket Star)) by Christie Golden
A Practical Guide to Racism by C. H. Dalton
Uncle Shelby’s ABZ Book: A Primer for Adults Only by Shel Silverstein
American Psycho by Bret Easton Ellis
Book of Erotic Fantasy by Gwendolyn F. M. Kestrel
Egghead: Or, You Can't Survive on Ideas Alone: Bo Burnham
Pleasures of Small Motions: Mastering the Mental Game of Pocket Billiards by Bob Fancher
Go-Go Girls of the Apocalypse: A Novel by Victor Gischler
Fart Proudly: Writings of Benjamin Franklin You Never Read in School by Benjamin Franklin
Invisible Monsters: A Novel by Chuck Palahniuk
Animal Farm: 1984 by George Orwell
Batman: Bat Signal (Mega Mini Kits) by Danielle Selber
Reasons To Vote For Democrats: A Comprehensive Guide by Michael J. Knowles
Catch The Jew! by Tuvia Tenenbom
Made in America: An Informal History of the English Language in the United States by Bill Bryson
Player Piano: A Novel by Kurt Vonnegut
Choke by Chuck Palahniuk
The WASP FACTORY: A NOVEL by Iain Banks
Creative Cursing: A Mix ’n’ Match Profanity Generator by Sarah Royal
The House of God by Samuel Shem
How to Teach Quantum Physics to Your Dog by Chad Orzel
Death from the Skies!: The Science Behind the End of the World by Philip Plait Ph.D.
Deer Hunting with Jesus: Dispatches from America’s Class War by Joe Bageant
Stuck Up!: 100 Objects Inserted and Ingested in Places They Shouldn’t Be by Rich E. Dreben
Animal farm: A Fairy Story by George Orwell
The De-Textbook: The Stuff You Didn’t Know About the Stuff You Thought You Knew by Cracked.com
In Fifty Years We’ll All Be Chicks: . . . And Other Complaints from an Angry Middle-Aged White Guy by Adam Carolla
Show Dad How
(Parenting Magazine): The Brand-New Dad’s Guide to Baby’s First Year by Shawn Bean
The Hard Evidence for God’s Existence: A Comprehensive Guide by Dr. James T. Jenkins
The Average American Male: A Novel by Chad Kultgen
The Numbers Game: Why Everything You Know About Soccer Is Wrong by Chris Anderson
The Book of General Ignorance by John Mitchinson
An Incomplete Education: 3,684 Things You Should Have Learned but Probably…
The Best Democracy Money Can Buy by Greg Palast
Johannes Cabal the Necromancer by Jonathan L. Howard
Pot-Limit Omaha Poker by Jeff Hwang
Nobody Poops But You by W. U. Ming