Padi Adventures in diving book. For advanced courses, adventures in diving, or refresh and knowledege update. Available in several languages. Includes Padi slate for some of the adavnced course exrecises.
Padi Dry Suit Diver manual. For specialty courses or knoledges refresh. Available in several languages.
Padi Crewpak instructor IDC course, with all teching gear to pass the idc exam. Available in several languages.