Consider the heavy contents on various technology, this book is for IT people who is assigned the task on DR/BC planning. The author did a great job on not only introduce the technology, but also point out the limitation of it.
Jon also rightly pointed out while the scope and stake are bigger, the nature of a DR/BC plan has been shifted from an infrastructure enhancement task to an application development project. With this right perception and principles recommended, you can now start a successful DR/BC planning project.