tuning help?

Hello all. I'm a little new to the tuning scene but I'm trying and really wanna learn it. I'm using neptune rtp n I love it so far but am a little confused on some things. Does anyone know of a book or write up or something that I can read to help me out a little? Such as overall fuel trim? Tps fuel trim etc? Setting high n low cam fuel maps? Any help is appreciated. If I could get ahold of it I can learn it pretty quick. Thanks for any help.