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Contests for Adults For Younger Readers

After Midnight Authors Contest
Win a choice of romances (monthly).
Assassins Contest New contest
Win Mukul Deva's scorching thriller (ends Aug 31, US & Can, not Quebec, 18+).
Berkley Jove Contests
Fill in the form to win from a selection of books (monthly).
Bookbitch Contests New contest
Chances to win 9 autographed thrillers (ends Aug 31, 18+).
BookReporter Contests
Win a variety of books each month.
BookReporter Word of Mouth Contests New contest
Broken Promise, Circling the Sun, Marriage of Opposites (ends Aug 7).
Carla Neggers Contests New contest
Win Declan's Cross & gift card (ends Aug 31).
The Comfort of Black Contest New contest
Win Carter Wilson's thriller (ends Aug 31, US, 18+).
Criminal Element Sweepstakes
Win crime fiction (ongoing).
Crown Publishing Read It Forward
Chance to win books (ongoing, US, 18+).
Dragon Coast Contest New contest
Win Greg Van Eekhout's novel (ends Aug 17, US & Can).
Elizabeth Lowell Contests New contest
Win Innocent as Sin (ends Aug 31).
Entry Island Contest New contest
Win Peter May's exciting new mystery (ends Aug 31, US, 18+).
Free Book Friday
Chance to win every Friday (weekly, US & Can).
Fresh Fiction Contests
Win a variety of books (ongoing).
Friction Contest New contest
Win Sandra Brown's novel (ends Aug 24, US, 16+).
Goodreads Giveaways
Win a variety of prerelease books.
Hachette Book Group USA Contests
Win a variety of books (ongoing).
James Patterson Contests New contest
Win a signed ZOO script (ends Aug 12, US & Can, not Quebec, 13+).
Jayne Ann Krentz Contests New contest
Win Secret Sisters signed ARC (ends Aug 31, US, 18+).
Myshelf.com Contest
Win books and audiobooks (ongoing).
NAL Authors Contests
Win from a selection of books (ongoing).
Nicole Jordan Contests
Legendary Lovers novel (ends Aug 31).
OnceWritten Contests
Lots of books, various genres (ongoing).
One Year After Contest New contest
Win William R. Forstchen's dystopian (ends Aug 19, US & Can).
Prime Crime Contests
Win a selection of mysteries (ongoing, US, 18+).
Random House Competitions
Win books, trips, much more (ongoing, UK, 13+).
Reader Views Contests
Win a variety of books (ongoing, US & Can, 18+).
St. Martin's Read It First
Sign up, chance to win books (ongoing).
Susan Elizabeth Phillips Contests
Win Heroes are My Weakness (ends Aug 31).
The Traitor Baru Cormorant Contest New contest
Win Seth Dickinson's novel (ends Aug 20, US & Can).
Updraft Contest
Win Fran Wilde's novel (ends Aug 3, US & Can).
Villa America Contest New contest
Win Liza Klaussmann's novel (ends Aug 24, US, 16+).
Writerspace Contests
Win ebook readers, books, gift certificates, much more (ongoing).

For Younger Readers Contests for Adults
Awake Contest
Win Natasha Preston's YA novel (ends Aug 6, US, 18+).
TeenReads Sounding Off on Audio New contest
Win Go Set a Watchman, English Spy CDs (ends Aug 21, US, 18+).
Ungodly Giveaway New contest
Win Kendare Blake's Goddess War #3 (ends Aug 26, US & Can).