I am about a quarter through this book so far and am loving it. I have no doubt it is probably one of the most thorough and comprehensive books on practical trance in existence. I highly recommend.
http://www.amazon.com/Trance-portation-Learning-Navigate-Inner-World/dp/1578634059/ref=sr_1_2?ie=UTF8&qid=1358088924&sr=8-2&keywords=Trance+portation
My 2 cents, Peace