book recommendations

I'd like to start a Bookshelf section for the margin of this blog. What books have you found helpful as you have read about complementarianism and egalitarianism?

(UPDATE: Thanks for the suggestions so far--keep 'em comin'. I have added them, as well as others I am familiar with, to the Bookshelf in the margin. If you like freebies, the books promoted by CBMW can be downloaded for free. Click on our Bookshelf book links to find the free ones or click here to see the CBMW list. For some books on the CBMW list, you have to click on the name of a book to get to a page from which you can download it for free.)