It's unfortunate that Miller doesn't pay the same attention to the text itself, which tends to be wordy. Unlike most reference books of this stripe, the All-In-One Guide doesn't have particularly clear or useful diagrams, nor does it provide much in the way of tables. These types of tools may not be necessary for those familiar with R/3, but for the newcomer such elements can help tie things together.
Miller covers the basic R/3 modules and also touches on such issues as shifting operating systems and integrating third-party applications with R/3. Each chapter ends with several pages' worth of questions, followed by somewhat lengthy but useful answers. All in all, this book is an effective guide to the intricacies of R/3, particularly from a study guide perspective. --Sarah L. Roberts-Witt