First things first - this book is on the Finite Volume Method - amazon do not make this very clear (read the book cover picture).
Dry and heavy going this book is NOT. Over simplistic - no. This book takes you into the heavily mathematical and theoretical world of CFD and makes it seem like a walk in the park. The book is a mass of graphs, tables, flow diagrams and figures. The theoretical principles are clearly elucidated - they even have the unprecidented nerve to write verbal equations below the maths to clearly identify the significance of each element!
Seriously, I am delighted with this book. In ten years of blood sweat and tears, this is the first text in the field that I have read that makes the whole subject readable. I am no stranger to the production of course material being a lecturer by profession and this is excellent. The authors must have laboured long and hard to get the material to this level and I congratulate them... if only all text books were like this one.