From the introduction: Letters from the Flaming Crab is a monthly series of Pathfinder-compatible supplements. Each Letter focuses on exploring a different topic to give gamemasters and players new, exciting options that can be dropped into any campaign. In this volume of Letters from the Flaming Crab you'll find new variations of the pseudodragon, faerie dragon, and tidepool dragon as well as new character options (for both characters and familiars) and a new type of wondrous magic item known as a dragonstone.