Simon Cowell "remains friends" with his unauthorized biographer Tom Bower.

The 52-year-old music mogul granted the journalist hundreds of hours of access during Tom's research for the tell-all book - which sensationally claims Simon had a fling with Dannii Minogue and wanted to sleep with Cheryl Cole. But despite the subsequent fall-out, Tom says he has enough dirt on the X Factor boss for a follow-up, and insists there is no bad blood between them.

"The first call was, 'You are getting a lot of publicity for your book.' He said, 'It's a bit embarrassing, you got things I didn't know you'd got.' But we get on very well. Finally he said to me last night, 'We remain friends.' There will be a sequel. He'll be with us for a long time I think," he said, recalling his conversation with Simon after the book's release.

However, the writer insists that despite Simon's co-operation, he still had to work hard to find out the truth about his many women: "He didn't hand it out to me. He made me go and do what journalists do, which is dig. Then I confronted him with some things - and other things I wouldn't tell him about."

But having formed a close bond with the star, Tom says there were a few things he decided against including out of respect: "There are a couple of things. I got so close to him there were times he would say things, do things ... we were so close I was privileged to see things. I thought that was so private, I wouldn't abuse my facility. That was something I really shouldn't put in the book."