from the back cover: "Two of the Twisted Earth's most feared and technologically advanced factions, the Foundationists and the Metal Gods, are presented together in this super charged Darwin's World sourcebook. Inside this book gamemasters will find a detailed history of these two advanced post fall societies and an array of new classes, feats, and high tech weapons salvaged from the ruins of the Ancients. The Foundationist/Metal Gods sourcebook is an essential expansion for Darwin's World or any post-apocalyptic d20 modern game."

This is a setting rich sourcebook in softcover. 200 pages