We collect and review all of the title suggestions via the Wishlist.
It helps us when you include your suggestions there, because other users have the chance to upvote them, too! You can find a step-by-step guide on how to do this here.
If you’re a nonfiction author, or publisher who owns the rights to a nonfiction book, you can submit your book to be blinked here: contentpartners.blinkist.com/submitbook.