I am a first year physics graduate student. I double majored in math and physics, so I wasn't required to take a math methods in physics course. Looking at the course that was offered at my undergraduate institution, the only topics it covered that I am only deficient in are complex analysis and heat flow. The textbook for that course was Mathematical Methods in the Physical Sciences by Boas. Is that a good book? Are there other good math methods books out there as well.