Journey through time and space with the longest-living man in the universe in this mind-bending novel from New York Times bestselling Grand Master of Science Fiction Robert A. Heinlein. Time Enough for Love follows Lazarus Long through a vast and magnificent timescape of centuries and worlds. Heinlein's longest and most ambitious work, it is the story of a man so in love with Life that he refused to stop living it, and so in love with Time that he became his own ancestor.