TimetoSleep0616A hot new “children’s” book by Adam Mansbach, Go the [expletive] to Sleep, is a parody of writer Eric Metaxas and artist Nancy Tillman’s book, It’s Time to Sleep My Love, but Metaxas, who understands the comedic nature of parody and who has written parody of his own, is uncomfortable with the tribute.

“My book explores the sweet, innocent side of bedtime,” Metaxas said, pointing out that the parody focuses on “the dark, funny side of the process.” He added, “It makes me uncomfortable that a number one bestseller would have the f-word in it. It makes me wonder where we’re going as a culture.”

So far, Mansbach’s book has sold more than 400,000 copies, and Fox recently purchased the movie rights. The publisher’s press release declares that its parody of Tillman and Metaxas’ book is proof that It’s Time to Sleep My Love has “reached iconic status.”

“I don’t have problems with making fun of it,” Metaxas said, but the obscene language troubles him. “It mitigates the joy of the parody for me.”