Have you ever been at a pond or lake during a dragonfly hatch? It's a great time to get some photographs. The colors of a newly hatched dragonfly are very vivid and the dragonfly's colors become more muted as time goes by until, at the very end, some species appear quite chalk like.
If you want to find out all about dragonflies one great source is Dragonflies Through Binoculars by Sidney W. Dunkle. This book has loads of pictures and information and will have you identifying meadow hawks from river cruisers in no time.
If you would like to move on and try to raise and release your own dragonflies, or if you just want to know how they do it, then the book for you is Dragonflies of the World by Jill Silsby and Michael J. Parr . This is a more indepth life history of dragonflies than your typical field guide.
The larva are best observed in stagnant waters of wetlands, ponds, and lakes. They are ferocious hunters and move like miniature tanks. They are difficult to raise and need a long term commitment because they often stay in the larva stage for 2 or more years.