There are only a handful of books about the craft that have stuck with me over the years.  I'd much rather read a variety of genres first, write second, then worry about the books about writing.  But I can't shake the simple, concise advice of ol' Strunk and White's Elements of Style along with the "Hey, you, yeah, Constant Reader" tack of Stephen King in On Writing: A Memoir of the Craft.  Then there's Ernest Hemingway on Writing, a bundle of letters compiled and edited by Larry W. Phillips; love or hate  Papa, there's still much to redeem the man as writer in these collected correspondences. And then today I had to flip back through Elmore Leonard's 10 Rules of Writing: pithy, succinct, utilitarian--just as I like it.  

So how about your own fave books on the writerly craft?