If you have some exposure to BNi or have been a part of it then the book is acts as a guide for you to optimise your journey and to become loyal to the organisation. The book tries to affirm your belief in the BNi system and tries to ensure you invest in it.
For someone else who is picking the book thinking it is a networking book, you will be feeling misled into reading a promotional material for BNi. If you try hard to read past the promotion, there are genral things you can apply elsewhere, but apart from that, nothing special. Avoid this book.