This is a very good book on non-relativistic quantum mechanics by an acknowledged master of theoretical physics. Almost every sentence is meaningful and well thought out. However this book is not meant for a novice who wishes to study the subject for the first time. Landau's unique perspectives on this subject (as well as others in his famous Course of Theoretical Physics) is best appreciated by physicists who are well versed in their disciplines. The reader should also be aware that recent developments such as quantum entanglement and quantum computation are not in the book. All in all, a very good book to add to your physics collection.