Callahan's Key

Nobody blends good science with bad puns as brilliantly as Spider Robinson, as his legion of devoted fans will attest. Now he's back with the latest chapter of the Callahan saga — an improbable tale of impending doom, a road trip, space, drugs, and rock 'n' roll.

The universe is in desperate peril. Due to a cluster of freakish phenomena, the United States' own defense system has become a perfect doomsday machine, threatening the entire universe. And only one man can save everything-as-w…