I've found that "The Mythical Man-Month", "The Inmates Are Running the Asylum", "The Limits of Software", and "Understanding Comics" (Sorry, no links handy) are all very good. And yes, I'm serious about "Understanding Comics".

I'd put them ahead of the programming references that everyone's thrown out so far. You already know how to program to some extent--these books don't tell you how to program, they tell you how to design, what to program, what not to program, and how some of the asethetics and art behind programming (and behind creation in general) work.

Or, to put it another way, you already know how to create. These help you figure out what to create, and how creation works.