The title of this book is a field guide to "Butterflies and other insects". You might be surprised (although also delighted) to find that it covers not just spiders but worms, snails, and in fact almost every invertebrate you are likely to want to identify.
This made me laugh at first (I couldn't help thinking of Peter Cook's nasal voice on stage in "Beyond the Fringe" saying 'Did you knooooow . . . the whale is NOT a fish . . . . . . it is an INSECT') but in fact most other books for the adult layman just ignore the less glamorous things you find in your garden. Meanwhile schools and nature reserves are constantly going on to kids about "mini-beasts", and if you're to help them you need an ID guide like this.
The book also gives a lot of info about habitats and life-cycles. Usefully, it has a good guide to identfying CATERPILLARS. Most butterfly books ignore these, but it's awfully important to know what they are when you find them in your garden eating your prize wotsits!
This is an absolutely excellent book, good for adult or child, full of top quality information, and doing far more than it says on the tin!