This book contains an introductory overview of Bluetooth, followed by an assortment Bluetooth topics. It was written by 3 (or 4) different authors and it looks it. It is hardly a well thought out, comprehensive approach to Bluetooth applications development nor is it an applications guide as its title suggests. Prior to reading this book I read "Bluetooth 1.1 Connect Without cables" and many other Bluetooth articles and papers. I was looking for a book that would pull all the information together into a useful concise applications guide. This book does NOT accomplish that.