I've given this book a 4 star rating because I used it heavily for exam revision and successfully learned the required material from it. Bear in mind though, that the book was designed for my course and was given by the author. There are two problems I have with the book. One is the amount of typographical errors in equations. This is bad, considering the book is in its 3rd revision and is meant to have been proof read by collegues. Consequently, I would not recommend using it where you do not have access to lecturers who can check any queries, unless you are a first class student who can confidently discern the errors. Secondly, Dr Rae swaps notation for angular momentum in a way that could be confusing. To put it as simply as I can, people reading the book who have some previous knowledge of the J=L+S relationship, may be confused when he uses L as TOTAL angular momentum in the earlier parts of the book, where one does not "officially" know about intrinsic spin and spin-orbit coupling etc. This leaves the reader wondering if another glaring error has been made. A consistent approach with J being used early would be best, with a note at the beginning giving a brief explanation and refering the reader to the more detailed discussion when sufficient groundwork had been completed. Also, Rae is fond of "...and clearly it can be seen that..." statements, which sometimes left me flicking back through the book to find which relationship he was invoking. Overall, this is a good book covering a wide range of undergraduate material at the right level. I think it's best suited to a 3rd year course. For those completely new to QM, it doesn't meet the bible status which I can attribute to "Quantum Physics of Atoms..." by Eisberg and Resnick (Wiley).