Gemma Files’ famous book is titled ‘A Book of Tongues.’ Ed Morrow, a Pinkerton agent goes undercover with one of the most deadly criminal organizations in the strange West two years after the Civil War. The group led by infamous lieutenant (and lover) Chess Pargeter and former Confederate chaplain turned “hex slinger” Reverend Asher Rook, is hiding some terrible secrets. Rook has an unholy marriage with the goddess Ixchel that will seal his ambitions to break natural law and transform the planet. Morrow is trapped between harsh calculations, monsters, and gods, and Chess Pargeter is the key to surviving. To find the truth and accept their fates, they will ride through Hell together.