Rapid Mobile Enterprise Development for Symbian OS (An Introduction to OPL Application Design and Programming) is the descriptive but slightly lengthy title of what author Ewan Spence has been calling "The OPL Book". As reviewer Steve Litchfield discovers this book is the best introduction to OPL yet, covering the development from scratch of two example applications, and featuring an extensive refererence section including the full OPL command reference. For those yet to take the plunge into Symbian development, OPL's RAD approach provides an ideal way to start writing Series 60, UIQ, and Series 80 applications. This book appears to be the perfect companion for that journey of discovery.