This is a really really good book if you're looking to understand a bit more about the general layout of a refinery, its units, their chemistry and some of the more gruesome picky details about what's in your petrol/gas tank.
You can search the table of contents and I recommend you do. You'll see that this is a technical book for non-technical people. I've a degree in engineering, some A level chemistry and 14 years working in and around refineries (in IT [plant computing] admittedly). On a straight-through read I found the amount of information overwhelming, and some material caused mothballed parts of my brain to fire-up again. I'll need to read it another two or three times to really extract the value.
If you're looking for a book on refinery planning, scheduling, oil accounting, economics - forget it. This book is about the technical side of turning crude into saleable products and how the processes have evolved to produce more and more petrol/gasoline from a barrel of crude.
Its a great book, i'd heartily recommend it and I wish the same existed for the other areas of refining.