Green Eggs and Transducers by Carin Meier.
From the post:
A quick tour of Clojure Transducers with core.async with Dr. Seuss as a guide.
A quick guide to transducers in Clojure 1.7, using strings from Green Eggs and Ham.
Using the familiar, Green Eggs, to illustrate the new, transducers, is an idea that needs to catch on!