This Managers Pocket Guide introduces thinking systems concepts and then takes the reader through a series of concepts and practical tools for applying system thinking to: Getting results, learning, managment processes, change and strategic processes.
This pocket guide is useful as a pocket guide. That is, it provides a wealth of quick summary information on a variety of core topics in the systems thinking domain. If you already have a good grounding in systems thinking, then paging through this guide will be a good refresher. Without a prior knowledge of the material, I don't think this guide provides enough detail for application.
In terms of recommendations, this would be a good tool to refresh an experienced systems thinker or as a companion guide to a student using a more in-depth textbook.