Faerie Mysteries explores the influence of fey creatures and the faerie realms on a Pathfinder Second Edition campaign world. It is not so much about monsters and magic as it is about how the influence of the fey can change the feel and flow of a campaign, and it gives you a game-mechanical system for describing and representing that. Like its upcoming companion products, Faerie Bargains and Faerie Passions, this book provides a fantastic primer on the use of fey creatures in a campaign, balancing the hardcore game rules with explorations of fey creatures' mythological origins and role in real-life history and legends. What this product is really about is making fey different, to make them strange, unpredictable, and menacing in turn. They are never quite what you expect, and this product describes subtle shifts you can use to create an interesting variety of alternate creatures. A campaign featuring the fey should feel different than other campaigns, and when you introduce Faerie Mysteries, it will. Grab this 32-page Pathfinder Second Edition accessory and Make Your Game Legendary.