Read the book of not knowing first, then pursuing consciousness.
This book is much less practical than pursuing consciousness. It is not a book about enlightenment, per se, and has not been too helpful for me in this domain. Instead it is (if I were to sum up) about how mind creates and shapes all different aspects of our experience (it is looking at the relative, though grasping the absolute would naturally recontextualize the relative as well).
It is also much less 'charitable' than the book of not knowing--some radical assertions are presented and it is left to the reader to experience them themselves. Ralston is not trying to convince you of anything. The first two books in this 'series' are definitely crucial to establishing the open mindedness necessary to even consider many of the assertions made here.
This book is an excellent starting point for some very profound contemplations. However, these are very abstruse in that they are concerned entirely with grasping what's true and not with self improvement (despite the potential for such insights to be transformative). I have yet grasped very few (if any) of the communications in this book but they are awe-inspiring nonetheless. I know that this book will become more and more relevant as I continue to become more conscious.