Relationship books that I recommend (updated 3/16/13)

I've read many more books than below, but the ones below I think are the most helpful in understanding men.

1. Have Him at Hello by Rachel Greenwald  (added 3/6/13)
2. The Passion Trap: Where Is Your Relationship Going?  by Dean C Delis
• Absolute must read if you find yourself "driving men away" OR if you find yourself pulling away from someone
3. Why He Disappeared by Evan Marc Katz
4. Why Men Love Bitches: From Doormat to Dreamgirl - A Woman's Guide to Holding Her Own in a Relationship by Sherry Argov
5. Men Like Women Who Like Themselves: (And Other Secrets That the Smartest Women Know) by Steven Carter and Julia Sokol
6. The Manual: A True Bad Boy Explains How Men Think, Date, and Mate --and What Women Can Do to Come Out on Top  by Steve Santagati
7. Manslations by Jeff Mac -- I'd suggest reading his Manslations web archives. His book is a condensed version of his website, in less rambly form and with more commentary. His "golden rule" and "two questions" and how to apply them are the key takeaways.