Is Katy Perry ready to open up to the world even more? Britain's The Sun is claiming that she's set to write an autobiography that will cover such topics as her marriage to and divorce from Russell Brand , plus her current relationship with John Mayer .

A source is quoted as saying, “Several publishers have been after Katy for a while. She decided to go ahead so fans don’t have a one-sided story when Russell publishes another Booky Wook .”

The source was referring to Brand's two best-selling autobiographies, My Booky Wook and Booky Wook 2 , the latter of which was dedicated to Katy and was released before their split in late 2011.

Katy reportedly signed a deal worth two million British pounds, or approximately three million U.S. dollars, to write the book, supposedly titled Part of Me . The Sun doesn't mention the publisher.

You may recall that Katy's concert film/documentary last year was also titled Part of Me .

Copyright 2013 ABC News Radio