I Picked up The MIDI Companion by Jeffry Rona on a recomendation from a kind fellow talkbass poster. Amazon Link to The book I bought it as a complete NOOB to MIDI. While it is in no way a complete "bible" it definantly answered all of my beggining questions and layed down a foundation of knowledge. Its an easy read too. Check the link and read some reviews. Most are favorable.