Like it or not, “Fifty Shades of Grey” is now the biggest book series since “Harry Potter.” In the US and Canada, more that 15 million copies of the triology were sold in the first three months; now it's up to 20 million!

The series is so hot, it’s on fire -- literally. A group of DJs in Ohio decided to take a lighter to the erotic novel.

About 50 people gathered to watch the book blaze – some say they were there for the drinks while others say the novels have caused serious issues for their friends.  

“Men can’t live up to this book, and it becomes an issue,” says WMMS DJ Chad Zumock. “They’re more interested in this and the guy’s just going to bed alone.”

We also have this warning for any moms out there indulging in the series: Your kids might also be getting their hands on it. Keke Palmer, an 18-year-old actress and singer who appears on Nickelodeon, tweeted that she loves the novels. Could your curious teens and pre-teens be picking up the books, too?