I'm not sure how he's done it, but David Mitchell has written a novel that is adorned with haikus that are so subtle and descriptive that his writing comes off as effortlessly rich. Here's an example:
Uzaemon looks away. To stop and think would be to abort the rescue.
Feet splash in puddles. The brown river surges. Pines drip.
Uzaemon asks Shuzai, "Are we to lodge at Ishaya tonight?"
And I don't even have enough room here to mention the thrilling plot or the deftly researched historical dialouge.