Order [book in series=yearoffirstbook.book# (eg 2014.01), stand-alone or one-author collection=3333.pubyear, multi-author anthology=5555.pubyear, SFM/MM=5000, interview=1111]: 1941.01

Methuselah’s Children by Robert A. Heinlein

Methuselah’s Children introduces us to Lazarus Long, a popular character in several of Robert A. Heinlein’s books. Lazarus, who wears a kilt (but there’s guns strapped to his thighs!) and can’t remember how old he is, is descended from one of several families who, long ago, were bred for their health and longevity. Lazarus and his extended clan live very long lives — so long that they must eventually fake their own deaths and take new identities so that others don’t get suspicious about their supernatural abilities.