The definitive (well, I think the only, but it’s awesome) book on the trout streams of northeast Iowa. I can’t recommend it enough. You can purchase it here. It has synopses, maps, and directions for most of the streams. I believe the last revision was 2007, so at this point there are a few streams listed on the DNR site and map that aren’t in the book, and some of the stocked portions have changed slightly. It doesn’t matter – I’ve read this book cover to cover multiple times and combined with the paper trout map you can request for free from the DNR it’s absolutely indispensable if you’re interested in learning the streams. Jene Hughes is a gifted writer, and there are chapters on gear and fly selection, tactics, etiquette, and much else.