An up-to-date order-by-order introduction and reference handbook for students of biological sciences in general and entomology in particular. Covers all the important groups on a worldwide basis and explains what makes insects successful. The book is in three sections: first is a straightforward introduction to insect biology; followed by a section on field work; lastly an order-by-order catalog of the insects giving essential facts and details of life-histories, highlighting what makes each order distinct. To make the material as accessible as possible, the information for each order is presented in a standard manner and is written in a straighforward style with as little technical language as possible. Essential terms are fully explained in context with marginal notes. A pictoral guide, specially commissioned by Richard Lewington, is included to aid in the identification of the orders.