Compelling science fiction adventure from New York Times bestseller Robert A. Heinlein: two classic novellas, Gulf and Lost Legacy, and two short stories with s

The nova effect makes the H-bomb look like a kitchen match--one bomb can vaporize an entire planet. An undercover agent carrying the secret of this weapon must

Captain Kirk first encountered Gary Seven on twentieth-century Earth. Now Seven, a time-traveling operative for unknown alien forces, makes a surprise visit to