Dungeons & Dragons: Princes Of The Apocalypse

Four cults dedicated to evil elemental powers have infiltrated the North, bringing terror and destruction to the Forgotten Realms. The cults' agents are everywhere-but who are they, and what is their ultimate plan? When you don't know whom to trust, knowledge is your only weapon. Unearth the Deception.

255 page hard cover.  5th edition.  Wizards of the Coast