Frank Sinatra's former lawyer has sued Kitty Kelley, claiming she defamed him in her best seller "Nancy Reagan: An Unauthorized Biography."

Beverly Hills attorney Milton Rudin seeks unspecified damages from Kelley and publisher Simon & Schuster. The lawsuit was filed Monday in federal court in New York. Rudin charges the author harmed his reputation by falsely implying he had discussed a client's personal life with her.Kelley's book lists Rudin as one of hundreds of sources in her unflattering portrait of the former first lady. Calls placed after business hours on Monday to Simon & Schuster went unanswered.

Kelley's books on Sinatra and Nancy Reagan suggest a romantic relationship between the singer and Mrs. Reagan. Sinatra has denied such a relationship, and former President Reagan said the book about his wife is full of lies.