"Fifty Shades of Grey" has been one of the most successful books in the erotica genre, but it has got some bizarre competition in the form of dinosaur erotica.

T-Rex and other demonic creatures going down on a woman. Jezebel reports that Christie Sims and Alara Branwen, two authors who write these erotic stories with demons, orc, ogre, dinosaurs and other mythical creatures as the protagonists, have garnered favourable reviews for their uber-creative erotica feast. The books are short stories of not more than 20 pages.

These bizarre books are available via Amazon and Kindle and the come with a caution - "Warning: This is a tale of beast sex. This story was written to unlock your darkest fantasies and innermost desires. It is not for the faint of heart and is not your mother's erotica."

As the warning suggests, these books are meant only for people with weird fetishes and fantasies locked in their hearts. The cover of most of these books like "In The Velociraptor's Nest," Running From The Raptor," and "Taken By The T-Rex" features dinosaur and a beautiful woman ready for the act.

One of the authors, Christie says that she is a "plain old, everyday Midwestern girl that lives a normal life" but she has "lusty thoughts of big, strong, powerful monsters having their way with beautiful maidens," according to E! Online.

The internet is filled with freaky erotic stories, but then they don't have a storyline, they all jump straight to the point. Books by Christie and Alara have storylines, and that is why they have quite a fan following.

Description of Taken At The Dinosaur Museum

"The job market was tough, and it couldn't have been tougher than it was on Kate. She'd been looking forever for a new job, but she couldn't find one. As she was reading through the paper one day, she came across an ad for a museum looking for a night watch person. She gets the job and finds herself as a night guard, working for a dinosaur natural history museum.

Things there are normal and quiet...until all of the dinosaurs come alive! Now Kate must try her best to elude the voracious creatures. Why did these creatures come alive? What did they want? Why do they seems so interested in certain parts of her body?" - courtesy Amazon.

Check out the slideshow of the freaky book covers and tell us if you are game for dinosaur erotica. All Images courtesy - Amazon.