There are thousands of books written about fishing. This one, though, is a real gem. It's called Matching the Hatch and fits perfectly into a shirt pocket.
The beauty of this book is that it gives you everything you need to know about matching insect life with artificial flies. It has: • Superb photographs of aquatic insects (larvae, pupae, adults) with the artificial flies positioned alongside them • Times of hatching • The geographical distribution • Whether it is a river fly or a lake fly, or both • Life cycles of the insects • Clues from the river and from the trout’s behaviour.
We heartily recommend this book for anyone who's interested in fly fishing. And at £7.99 from the tackle shop, it's the bee's knees.