Volume 2 - 1st printing. Collects The Doom Patrol (1964-1973 1st Series) #96-107, Challengers of the Unknown (1958-1978 DC 1st Series) #48, and The Brave and the Bold (1955-1983 1st Series DC) #65.

Written by Arnold Drake and Bob Haney. Art by Bruno Premiani, Bob Brown, Sal Trapani, and Dick Giordano. Cover by Bob Brown.

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!

Softcover, 360 pages, full color.