Heinlein's last set of books, incorporating characters from his entire ouvre. Themes involve long life, time travel, "universe hopping", and lots of lasciviousness. DEFINITE PREREQUISITES: The Moon is a Harsh Mistress, The Rolling Stones, Stranger in a Strange Land, Revolt in 2100, Methuselah's Children Recommended: Glory Road, Baum's Oz books, Burr…