Taylor Dinerman offers an appreciation of Heinlein on the occasion of his centenary. Of course, he conveniently skips over that embarrassing incest novel Time Enough for Love, but I've always marveled that that one raised eyebrows at all. After all, the heroes of "All You Zombies" (considered by some to be the best time travel story ever—although I confess to being thoroughly creeped out by it) and "By His Bootstraps" go considerably further than traveling back in time to seduce their mothers.
