Like Auggie mentioned, Billets to Bows, by Glenn St. Charles is another good one, and one that focuses on yew. TBB1 covers all the basics, and like others have said here, this is the one to have if you have only one.
Dean Torges Hunting the Osage Bow is great stand alone book as well if you are planning on making an osage bow, though most of the principles covered apply to bow-making in general as well.
From the Den of the Old Bowhunter, the stories and photogrpahs of Chester Stevenson, Edited by Nick Nott is not an inctructional book by any means, but the hunting tales, the bow-making tidbits, and the photos of archery equipment are quite the inspiration.
I would love to get my hands on a copy of The Bowyer's Craft by Jay Massey, or his Book of Primitive Archery Anybody have copies they would trade?