These are the books I have personally read, learned lots, and highly enjoyed.
Please check out the Pitzer IIS 38 page for more reading on philosophy and Traditional Chinese Medicine.
These are some things that I enjoy using and found useful for my training. These are not necessary, but can be useful in your training. I recommend Tom Bisio’s “Taking a Tooth from the Tiger’s Mouth” to help you learn how to use cupping and moxa sticks.