French artist Rémy Dautin has put together a book that he's titled La Réalité. In it, he's collected about 60 pictures of cryptids in which he's "erased the paranormal element (loch ness monster, alien, yeti, etc.) in order for them to become pictures of the reality."
Unfortunately, I don't think the book is available for purchase. It's a project he did while pursuing a degree in graphic design, and he sent me an email to let me know about it. However, you can check out some of the pictures from La Réalité on his tumblr blog.