I always recommend William Buhlman's Site and books regarding AP questions, tips, etc. Here's a link:
http://www.astralinfo.org/how-to-guides/
Robert Monroe is another great author and AP/OBE pioneer. He wrote 3 books prior to his death; Journeys out of the Body, Ultimate Journey's and Far Journeys. All highly recommended as well.
Yes, you can 'meet up' with deceased loved ones. I don't know about meeting with God or healing people. When it comes to AP, are you a beginner, advanced... ?