In this second helping of Silver Age Doom Patrol adventures, the world's strangest super-team investigates the mystery of the blue stone monkeys that are driving men to murder! Plus, General Immortus, Garguax, and the Brotherhood of Evil scheme to turn humanity into crystal beings under their control! Collects Doom Patrol #96-107, Challengers of the Unknown #48, and The Brave and the Bold #65.
— Description from Comic Vine community (comicvine.gamespot.com).
