I love book tests, and this is an especially nice one that fits in your pocket and uses a method
that I hadn't seen before. There's a small bit of memory work required, but if you are familiar with
NATO phonetic alphabet (you know, "alpha, bravo, charlie..."), you've got it pretty much licked
already.
Attractively designed with a clever method and reasonable price, this is a worker
to add to your walk-around set. It's excellent.