- His Secret LifeBob Berkowitz
- What men won't tell you but women need to knowBob Berkowitz, Roger Gittines
- He's just not up for it anymoreBob Berkowitz
- Doctor Hubbard's Sex Facts for Men and WomenBob Berkowitz
- Why Men Stop Having Sex Men The Phenomenon Of Sexless Relationships And What You Can Do About ItBob Berkowitz