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Contests for Adults For Younger Readers

9 1/2 Narrow: My Life in Shoes Contest New contest
Win Patricia Morrisroe's memoir (ends Jun 25, US, 16+).
After Midnight Authors Contest
Win a choice of romances (monthly).
Berkley Jove Contests
Fill in the form to win from a selection of books (monthly).
Blood of the Cosmos Contest New contest
Win Kevin J. Andersonís Saga of Shadows #2 (ends Jun 30, US & Can, not Quebec, 18+).
Bookbitch Contests New contest
Chances to win 10 autographed thrillers (ends Jun 30, 18+).
BookReporter Contests
Win a variety of books each month.
BookReporter Word of Mouth Contests New contest
All the Single Ladies, Blueprints, The Truth According to Us (ends Jun 19).
Carla Neggers Contests New contest
Win a Cider Brook CD (ends Jun 30).
Criminal Element Sweepstakes
Win crime fiction (ongoing).
Crown Publishing Read It Forward
Chance to win books (ongoing, US, 18+).
Day Four Contest New contest
Win Sarah Lotz's heart-racing tale (ends Jun 25, US, 16+).
Elizabeth Lowell Contests
Win Death Echo (ends Jun 30).
Free Book Friday
Chance to win every Friday (weekly, US & Can).
Fresh Fiction Contests
Win a variety of books (ongoing).
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 Miracle at Augusta audiobook (ends Jun 17, US & Can, not Quebec, 13+).
Jayne Ann Krentz Contests New contest
Win The Hot Zone (ends Jun 30, 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 Jun 30).
Night Tremors Contest New contest
Win Matt Coyle's new thriller (ends Jun 30, US, 18+).
OnceWritten Contests
Lots of books, various genres (ongoing).
The Philosopher Kings Giveaway New contest
Win Jo Walton's Just City sequel (ends Jun 1, 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).
Summer Secrets Contest New contest
Win Jane Green's latest novel (ends Jun 30, US, 18+).
Susan Elizabeth Phillips Contests
Win a signed book (ends Jun 30).
Writerspace Contests
Win ebook readers, books, gift certificates, much more (ongoing).

For Younger Readers Contests for Adults
Awake Contest New contest
Win Natasha Preston's YA novel (ends Aug 6, US, 18+).
TeenReads Beach Bag of Books 2015 New contest
Win 10 YA novels (ends Jul 27, US, 18+).