E.L. James might have some competition coming her way.

James is the bestselling author of "Fifty Shades of Grey," which tells the story of a recent virginal college grad and her complicated relationship with sexy, controlling billionaire Christian Grey. He takes her into his world of BDSM while also finding things about himself.

Sylvian Reynard also has a similar book, another popular "Twilight" fan fiction: "Gabriel's Inferno" and its sequel "Gabriel's Rapture."

It was recently revealed that the books will release Sept. 4 of this year in the U.S. and Canada. It was reported that it will release with an initial run of 500,000 copies.

The book is described:

Enigmatic and sexy, Professor Gabriel Emerson is a well-respected Dante specialist by day, but by night he devotes himself to an uninhibited life of pleasure. He uses his notorious good looks and sophisticated charm to gratify his every whim, but is secretly tortured by his dark past and consumed by the profound belief that he is beyond all hope of redemption.

When the sweet and innocent Julia Mitchell enrolls as his graduate student, his attraction and mysterious connection to her not only jeopardizes his career, but sends him on a journey in which his past and his present collide.

An intriguing and sinful exploration of seduction, forbidden love, and redemption, Gabriel's Inferno is a captivating and wildly passionate tale of one man's escape from his own personal hell as he tries to earn the impossible-forgiveness and love.

Berkley Publishing, a division of Penguin, picked up the book in July.

It was reported that Penguin Books' Berkley imprint signed a 7-figure book deal with unknown author of two books.

The author behind the books, Sylvian Reynard, is a mystery, the Hollywood Reporter said. The release announcing the deal omitted any biographical information and "Sylvain Reynard" is a pen name.

Similar to "Fifty Shades of Grey," the Gabriel's novels started life as a "Twilight" fan-fiction story called "The University of Edward Masen."

On the author's website, it was announced that both the books will have Spanish translations in the future. Also, Penguin U.K. will publish both novels so that it will be available there. Penguin Australia also will publish both nove,s

"Gabriel's Inferno" and its sequel "Gabriel's Rapture" are presently available in e-book format.

Have you read the "Fifty Shades of Grey"-like book? Share your thoughts with comments below!

[A previous story said that the books would release Sept. 13. However, that date is for Australia. Sept. 4 is the date for U.S. and Canada.]