The Dark Heart of Time, by Philip José Farmer, copyright © 1999 by Edgar Rice Burroughs, Inc.; Del Rey/The Ballantine Publishing Group/Random House, Inc.; 1st edition, 1st printing, June 1999; ISBN 0-345-42463-8.

It's been a while since I've read any of Burrough's Tarzan books, so I can't compare styles, but certainly in inventiveness and subject matter Farmer did a good job with this story. I've always been fond of Farmer's various different takes on Tarzan, whether an authorized pastiche like this one, a deconstruction, an alternate mythology, or a backstory element [1].

I really should complete my collection of Tarzan novels, though.