Checkout my book review site (blog) called http://helpfulbooks.wordpress.com because I've just reviewed a book that I feel really helps people like me (and my clients).
Thanks for the great book references Jennifer. I just picked up an older (10 yrs) book in the same genre as a couple of those on your site. It's called "Zen and the Art of Making a Living". Have you heard of it or read it? I'm really liking how he weaves bigger questions (worldview, how did we get in this 9-5 mess, life mission/vision, etc.) with really practical Qs about finding fulfilling work, etc. Anyway, I'd highly recommend it so far --though it is a hefty book.