Not old enough to fight in the First World War (though he did manage to fight in it centuries later, by going back in time), but destined to lead the first successful expedition to another star system, and then some, the (literally) immortal Lazarus Long is the most popular and enduring character created by Robert A. Heinlein, author of numerous New York Times best sellers. Across five decades, he appeared and reappeared in Heinlein's most popular...