Whatever happened to that ex-love you can't forget?

Donna Hanover (search), former wife of ex-Mayor Rudolph Giuliani (search), recommends reconnecting with an old flame. She did, and married him. Then she wrote a book about it.

The book, "My Boyfriend's Back: Second Chance at Love" (search), is due in bookstores Tuesday, in time for Valentine's Day. In it, Hanover talks about finding her lost love, Ed Oster, at a Stanford University reunion, some 30 years after they split up. The couple was married in August 2003.

She and Oster, an attorney, have two homes: in Newport Beach, Calif., and New York City, where Hanover is raising her children with Giuliani.

"People loved hearing our story," Hanover said in a news release promoting the book. "People often responded with their own stories of a cousin or friend who had reconnected with a long ago sweetheart and fallen in love."

Hanover, 54, the host of the nationally syndicated television program, Famous Homes & Hideaways, was divorced from Giuliani after 20 years of marriage in July 2002, following an ugly, public breakup.

The book includes the stories of 50 other couples, including actress Carol Channing, who at age 80 recently married her high school sweetheart Harry Kullijiam, and Suzanne Pleshette and Tom Poston, both veterans of "The Bob Newhart Show."