As a chemistry student, I was required to do a course based on quantum mechanics. I found it somewhat challenging as it requires a different way of thinking. Although I managed the course material and passed the exam, I felt I needed some background information as the knowledge I had seemed to have no foundation. As a result I bought this book.<br>Reading the book did make things more clear, although I admit I had to re-read some sections before it 'clicked'. Overall a good book to get the basics of quantum mechanics and a good foundation on which to build.