HBO Films is planning to turn a best selling book about Barry Bonds' alleged steroid use and the federal government's wide-ranging probe into performance enhancing drug use in sports into a movie, one of the book's authors said Thursday. Lance Williams, a reporter at the San Francisco Chronicle, said that Ron Shelton has been tapped to direct the flick and will co-write the script with "Tin Cup" partner John Norville once the Hollywood writers strike is settled. The planned movie based on the book "Game of Shadows" was first reported Wednesday by Variety.