Free fiction: Audio of Heinlein's "By His Bootstraps"

Looks like a radio adaptation, though I've not played it. [via Free SF Reader]

Not among the better Heinlein stories, but it's included in the very famous "The Adventures in Time & Space". Sort of ... a longer & not-funny version of "All You Zombies" (download), but told in a somewhat Henry Kuttnerish style.

Related: Stories of Robert Heinlein.