Whether you want to drift dive primarily because condition call for it, or because you love it for it's own sake and seek it, the PADI Drift Diver manual covers what you need to know to go with the flow. You will learn about drift diving environments, types of drift diving, surface supervision, equipment, boats, techniques, procedures, hazards, and problems while drift diving.
Excerpt from the manual:
"Like a shark you glide over the reef. The underwater world whizzes by fast - often faster than you can swim. Yet you barely flick a fin, you roll effortlessly while swimming with your buddy. This is a typical drift dive - floating with the current rather than trying to swim against it. When the current is ripping, forget fighting and enjoy the awesome ride."