Odonata? You know what they are--dragonflies, damselflies, darners (we called them darning needles when I was young).
There's a short article in today's Independent, with a fabulous photo, of a damselfly on the back of a dragonfly. It is suspected that it may be a strange attempt at mating!
We have a large adult book full of photos called A Dazzle of Dragonflies by Forrest L. Mitchell [595.733 MIT]. It contains lots of information about the insects and also includes ideas for building a water garden to attract the creatures. (If you're at all interested in water gardens, we have several books covering the topic from a gardening and aesthetic point of view in the 635.9674 section, Kathleen Fisher's Complete Guide to Water Gardens, Pond and Fountains is just one.]
If A Dazzle of Dragonflies is checked out, go to Digital Dragonflies where you'll find plenty of dragonfly info. Make sure you check out the Photos page! Photos can also be found here.