- Happy and Sad
- Happy As A Bee
- Happy As Larry
- Happy Birthday Frankie
- Happy Birthday, Dear Amy (Replica #16)
- Happy Birthday, Klutzface! A Lesbian Comedy for Teens
- Happy Children Making Angels In The Snow
- Happy Day Poems
- Happy End gibt's nur im Film
- Happy Endings Are All Alike
- Happy Families
- Happy Girl Lucky
- Happy Halloween
- Happy Hippo Saves Christmas
- Happy Hippo, Angry Duck
- Happy Home Book
- Happy Hoppy’S Orchestra and Other Stories
- Happy Hour Stories - Stories from Grimm's Fairy Tales - Illustrated by J Monsell
- Happy Island
- Happy Island and the Typhoons
- Happy Kid!
- Happy or Sad? Baby's First Book of Opposites - Baby & Toddler Opposites Books
- Happy Peace Day
- Happy Piggin
- Happy Princess
- Happy Scoops
- Happy Shapes Make the World Go 'Round! Learning About Shapes for Kids - Baby & Toddler Size & Shape ...
- Happy the Hippo
- Happy Tunes
- Happy Valentine - i. A. Lisa
- Happy Valentine's Day
- Happy Zappa Cat
- Happy! Scattered Birds
- Happy, Healthy Minds
- Happy’s Holidays
- Har-Moni's Story
- Harakanloukku
- Harald Harst Krimis: Kriminalromane & Detektivgeschichten
- Harald Harst Krimis: Über 70 Kriminalromane & Detektivgeschichten in einem Buch
- Haram Yemenin Sonu
- Harbor Absolution
- Harbor for the Nightingale
- Harbor Me
- Harc és szerelem
- Harcelée... mais vivante !
- Hard Boiled
- Hard Case
- Hard Footwork
- Hard Hat
- Hard Love
- Hard Luck (Diary of a Wimpy Kid #8)
- Hard Time
- Hard Times
- HARD TIMES (Illustrated)
- Hard Times High
- Hard Times illustrated
- Hard to say I love you
- Hardcourt Comeback
- Harding's School for Vampires
- Hardly a Hero
- Hardwired
- Hardy Boys 01: The Tower Treasure
- Hardy Boys 02: The House on the Cliff
- Hardy Boys 04: The Missing Chums
- Hardy Boys 05: Hunting for Hidden Gold
- Hardy Boys 06: The Shore Road Mystery
- Hardy Boys 07: The Secret of the Caves
- Hardy Boys 08: The Mystery of Cabin Island
- Hardy Boys 09: The Great Airport Mystery
- Hardy Boys 10: What Happened at Midnight
- Hardy Boys 11: While the Clock Ticked
- Hardy Boys 12: Footprints Under the Window
- Hardy Boys 13: The Mark on the Door
- Hardy Boys 14: The Hidden Harbor Mystery
- Hardy Boys 15: The Sinister Signpost
- Hardy Boys 16: A Figure in Hiding
- Hardy Boys 17: The Secret Warning
- Hardy Boys 18: The Twisted Claw
- Hardy Boys 19: The Disappearing Floor
- Hardy Boys 20: Mystery of the Flying Express
- Hardy Boys 21: The Clue of the Broken Blade
- Hardy Boys 22: The Flickering Torch Mystery
- Hardy Boys 23: The Melted Coins
- Hardy Boys 24: The Short-Wave Mystery
- Hardy Boys 25: The Secret Panel
- Hardy Boys 26: The Phantom Freighter
- Hardy Boys 27: The Secret of Skull Mountain
- Hardy Boys 28: The Sign of the Crooked Arrow
- Hardy Boys 29: The Secret of the Lost Tunnel
- Hardy Boys 30: The Wailing Siren Mystery
- Hardy Boys 31: The Secret of Wildcat Swamp
- Hardy Boys 32: The Crisscross Shadow
- Hardy Boys 33: The Yellow Feather Mystery
- Hardy Boys 34: The Hooded Hawk Mystery
- Hardy Boys 35: The Clue in the Embers
- Hardy Boys 36: The Secret of Pirates' Hill
- Hardy Boys 37: The Ghost at Skeleton Rock
- Hardy Boys 38: Mystery at Devil's Paw
- Hardy Boys 39: The Mystery of the Chinese Junk
- Hardy Boys 40: Mystery of the Desert Giant
- Hardy Boys 39: The Mystery of the Chinese Junk
- Hardy Boys 40: Mystery of the Desert Giant
- Hardy Boys 41: The Clue of the Screeching Owl
- Hardy Boys 42: The Viking Symbol Mystery
- Hardy Boys 43: The Mystery of the Aztec Warrior
- Hardy Boys 44: The Haunted Fort
- Hardy Boys 45: The Mystery of the Spiral Bridge
- Hardy Boys 46: The Secret Agent on Flight 101
- Hardy Boys 47: Mystery of the Whale Tattoo
- Hardy Boys 48: The Arctic Patrol Mystery
- Hardy Boys 49: The Bombay Boomerang
- Hardy Boys 50: Danger on Vampire Trail
- Hardy Boys 51: The Masked Monkey
- Hardy Boys 52: The Shattered Helmet
- Hardy Boys 53: The Clue of the Hissing Serpent
- Hardy Boys 54: The Mysterious Caravan
- Hardy Boys 55: The Witchmaster's Key
- Hardy Boys 56: The Jungle Pyramid
- Hardy Boys 57: The Firebird Rocket
- Hardy Boys 58: The Sting of the Scorpion
- Hardy's Christmas Stories: Santa's Stolen Sleigh & Moo-dolph
- Hare Bounce Tales!
- Hare Dew and the Vanity Drop
- Hare Moon
- Harisnyás Pippi
- Harisnyás Pippi a Déltengeren
- Hark!!
- Harlem
- Harlem Hustle
- Harlequin
- Harley and Emma's Little Girl
- Harley Quinn: Reckoning
- Harley Quinn: Wild Card (Backstories)
- Harley's Gold
- Harley's Ninth
- Harley, Like a Person
- Harmless
- Harmonic
- Harmonious Hearts - Stories from the 2019 LGBTQ+ YA Challenge
- Harmonious Hearts 2014 - Stories from the Young Author Challenge
- Harmonious Hearts 2015 - Stories from the Young Author Challenge
- Harmonious Hearts 2016 - Stories from the Young Author Challenge
- Harmonious Hearts 2017 - Stories from the Young Author Challenge
- Harmonious Hearts 2018
- Harmony
- Harmony House
- Harmony's Secret (Interactive)
- Harmonía
- Harold Finn: Ninja Warrior "The Warrior Within"