This book has 13 chapters (the last chapter gives an overall view). I would have to agree with what fellow reader S. A. Mccullough (who gave this book a 1-star rating) said with regards to the first 5 chapters of the book - incoherent and has little to do with referral generation.
Real juice flows from the following chapters:
6. Using valuable content as marketing material
7. How to use Social Media, Blogs and tools like podcast and videos to engage customers
9. How to form win-win partnership with other businesses (both closely related and remote) to generate referrals to both partners
However, if you have read books like Get Content Get Customers : Turn Prospects into Buyers with Content Marketing
; Satisfied Customers Tell Three Friends, Angry Customers Tell 3,000: Running a Business in Today's Consumer-Driven World
; Word of Mouth Marketing, Revised Edition: How Smart Companies Get People Talking
like I did, then I can assure you that the ONLY chapter you would find useful and new is Chapter 9 (how to form win-win partnership for referral generation). If you have not read these books, then The Referral Engine might be a good overall guide for you (but still, skip chapters 1 to 5) and that is why, assuming you haven't read those books, I gave it 3 stars.
2 stars have to be taken away regardless of whether you are new to the topic of referral generation or not due to the book's poor organization. It lacks a readily useable framework - the author does mention a "4Cs framework" - Content, Context, Connection and Community - but sadly the chapters are not organized around the 4Cs, in fact, they are rarely even mentioned throughout the book, and readers are left with the difficult task of figuring out which part of the book falls into which of the 4Cs.
To me, this book is quite a disappointment, especially when it has so many 5-star reviews.