Calvin Klein was 69 when he took up with male model Nick Gruber - more than 40 years his junior - a few years ago.
Now that the two have parted ways, Gruber reportedly has plans to share the details of their time together in a book he's shopping around called What Came Between Me and My Calvin.
'Yes, it’s true that I’m writing a book,' Gruber tells the New York Daily News.
The Post reveals that Gruber has enlisted a well-known author to develop the book. The writer spoke to the newspaper anonymously and said the book will include details that are 'beyond shocking.'
'This is the only way he can get closure,' he said of Gruber. 'He has a lot of secrets about Calvin and he has the right to tell people. 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.'
Gruber was arrested for assault and cocaine possession in April. He then reportedly checked into a rehab facility in Arizona and is now living in Los Angeles.