Space Battleship Scharnhorst and the Library of Doom (An Old Guy/Cybertank Adventure!) (Volume 2)

It is the distant future and the human race has gone. Whether extinct or moved on to a higher level of existence, nobody knows. Their civilization has been inherited by the cybertanks: massive atomic powered war machines with mentalities modeled on the human psyche. Theirs is an idyllic existence: throwing parties, killing aliens, creating works of art, shooting skeet with hypersonic missiles. But now an ancient evil from the darkest nightmares of humanity threatens to resurface and destroy them all. Are the cybertanks up to the challenge?