Why Submit to Hidden Library?
If you write Mystery, Cozy Mystery, or Thrillers, you're welcome to submit your book for consideration in our newsletter. We're currently opening a limited number of free promotion spots for selected authors.
This helps us discover new voices, fresh releases, and hidden gems for our readers—and it gives you an opportunity to reach a growing audience of mystery enthusiasts who actively seek new books to read.
Guaranteed Promotion
In the future we'll introduce paid promotion options with guaranteed placements. For now, submissions are reviewed free of charge.
What We're Looking For
We accept:
- • Mystery, Cozy Mystery, and Thriller ebooks
- • Free or discounted books
- • Kindle Unlimited titles
- • New releases or strong backlist titles
- • Professional covers and clear genre placement
We review every submission carefully, though we cannot promise inclusion. Our goal is to feature books that will genuinely delight our mystery-loving readers.
How It Works
Submit Your Book
Fill out our submission form with your book details, cover image, and promotional information.
We Review Carefully
Our editorial team reviews all submissions for quality, genre fit, and reader appeal.
Receive Notification
If selected, you'll receive an email with your scheduled promotion date and details.
Get Featured
Your book appears in our newsletter, reaching thousands of engaged mystery readers.
Benefits
Targeted Audience
Reach readers who specifically love Mystery, Cozy Mystery, and Thriller genres.
Currently Free
Submit without any upfront costs. Selected promotions are completely free right now.
Professional Presentation
Your book is featured with cover, description, and direct retailer links in an elegant format.
Full Control
We link directly to your retailer pages. You maintain complete control of your book.
Important Notes
- ✓Free submission does not guarantee inclusion; paid slots coming soon
- ✓We review every book carefully for quality and fit
- ✓No hosting or distribution of ebook files
- ✓All promotions link to official retailer pages
- ✓You'll be notified by email if selected
Free submission • Professional review • Engaged audience