Most pregnancy books (The Unofficial Guide to Having a Baby, What to Expect When You're Expecting) have pretty extensive pre-conception sections. In fact, those two in particular, almost the entire first half of the book is taken up with it!
I'm not crazy about either of them for pregnancy itself (Unofficial Guide is too broad, and What to Expect is too preachy) but they're good resources anyway, and good for all that preconception stuff.
I'm not aware of any books just about preconception and conception, with the possible exception of (here she goes again) Toni Weschler's Taking Charge of Your Fertility. That book is sort of a guide to the female cycle and can be invaluable for birth control or conception. (And yes, everyone, I know this pregnancy is the result of NFP...but that was my mistake and carelessness, not Toni Weschler's.
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Good luck!
Oh, and lots of pregnancy magazines have stories about preconception as well-check them out too!