Knowing OSGi is essential for a real understanding of how Eclipse and Equinox work. As such, Eclipse plug-in developers will find this book indispensible. The book applies to the wider community too, and gives a real-world, practical insight into OSGi and how it works. Overall, this book is essential to any developer who wants to create an OSGi based, modular system. The combined experience of all the authors really shows, and makes the seemingly daunting world of OSGi accessible to everyone. If you are to buy only one book related to OSGi or Eclipse development, this should be the one.