Larry Birkhead and Howard K. Stern both plan to sue the author of a new book that claims the two men shared a sexual encounter before Anna Nicole Smith's death and worked together afterward to manipulate the media and maximize profits.
"Blonde Ambition: The Untold Story Behind Anna Nicole Smith's Death," by journalist Rita Cosby, hit stores Tuesday.
Birkhead, the father of Smith's infant daughter, says he has yet to see the book but he intends to sue Cosby, her sources and Grand Central Publishing.
Birkhead told The Associated Press: "This is going to be one of the most expensive lawsuit settlements in book-publishing history."
Stern's attorney says he also plans to "file and aggressively pursue a libel case" against Cosby and her publishers.
Birkhead acknowledges meeting with Cosby several times after Smith's death in February.
But he flatly denies he and Stern ever shared a sexual tryst.
Cosby claims there is a videotape of the alleged encounter and that one of Smith's former employees had seen the Playboy Playmate watching it.
But Birkhead says no tape could exist because the encounter did not occur.
Cosby says she quotes Birkhead on some topics in the book, but not on the sexual rumors.
She says she makes no apologies for the book and, as Cosby puts it, "...at the end of the day, the American public will see that these two men conspired to fool us all."