I would have liked to see more photos since many dragonflies look similar to each other, however this is a good field guidePublished 7 months ago by S. Mace
It covers most common dragonflies and damselflies of California. But at the same time this can be a introduction for the western fauna. Read morePublished 10 months ago by Hidetaka Natsume
The descriptions were very detailed and informative.
I would have like to have more photos, but the sketches were good.