Wayne Rooney's lawyers are looking into a new book about the soccer star's history with prostitutes.

The Manchester United star's legal team are investigating 'Roo Unzipped', whose author John Sweeney is said to have interviewed the 48-year-old hooker Rooney paid for sex as a young man.

The book is also thought to delve into the 21-year-old's relationship with fiancee Coleen McLoughlin.

A source tells The Sun, "It could be their worst nightmare. He thought the stuff about prostitutes was long forgotten.�

Wayne's spokesman Ian Monk confirms, �We�ve not co-operated with any book.�