The 64-page book Includes a detailed history and description of a number of historical shinobi (aka "ninja") ryu or clans, NPC write-ups, and a sample shinobi village.Shinobi Ryu contains additional information for both GMs and players, including:New Ryu (clans)!New NPCs!New Shinobi Profession Templates!A Shinobi Village, with full-page map and key!...and more!