I read How to Read Literature like a Professor for my AP Lit. class this year and it was an interesting book and it definitely is a good read whether you decide on reading it or not as it can help those not-as-good-at-identifying-Lit. devices (such as me) understand it better.
If you chose to read Kafka's piece, be prepared to have to analyze it until you die. It is one of those pieces that just has an extreme level of symbolism in it and most teachers require you to know just about every inch of it (that you can).