Calvin Klein’s Model Boytoy Nick Gruber Writing ‘Beyond Shocking’ Tell-All About Relationship: VIDEO

Calvin Klein's former boytoy Nick Gruber, who had a run-in with the law in April and subsequently entered a Klein-financed rehab session, is writing a tell-all about their relationship, the NY Daily News reports:

GruberThe 24-year-old male model plans to share all the sordid details, and a source tells us there are two strong offers on the table with a third one on the way. We reached out to Gruber and he confirmed he’s ready to tell his side of the story. “Yes, it’s true that I’m writing a book,” he said.

Gruber has tapped a well-known author to develop the book as they begin to flesh out the structure and chapters. The writer spoke with us anonymously, and called the content that will be revealed “beyond shocking.”

“This is the only way he can get closure,” he said of Gruber on the phone from Los Angeles. “He has a lot of secrets about Calvin and he has the right to tell people.”

After just two days of shopping the book — tentatively titled “What Came Between Me and My Calvin” — the offers started piling in.

“If it was just [Gruber’s] story, then there’s no way we could sell the thing, but because it’s about his relationship with this very private, very high-profile person, it’s generating a lot of interest,” said the writer.

TMZ cornered Gruber on the street last week and questioned him about their relationship.