http://www.amazon.com/Practical-Guide-Wall-Street-Derivatives/dp/0470383720 As I’m preparing for interviews, I happened upon this book and I highly recommend it as a concise reference for experienced practitioners and practical guide for beginners. Highly recommended!
Oh, there is a practical guide? Why am I studying so hard 
It’s a secret sauce for 3 months before and after the start of a sales and trading position. Nothing super advanced.