A gem of a book for serious  non professional physicists who is trying to learn and understand  QM on their own.<br>I also believe any QM student will benefit from this book as key concepts are discussed in a very understandable  manner.<br>I would reccommend anyone  thinking of buying this book  to first view  Prof  Susskind's ten 2 hour lectures on Quantum Mech M  that are on the Stanford site.<br>The material is written around those lectures and it is not like most typical classroom QM approach and  is  focused on conceptual understanding and just the right amount of mathematics to explain the central ideas.<br>It would also be beneficial  to have some  background on classical physics ie Hamitonians etc before embarking on  this book. This is covered in a previous book -The Theorectical Minimum which is also based on his continuing education lectures for non professional physicists.<br>The mathematics prerequiste are modest  -- the level where most engineering students can handle.<br><br>Taken with the lectures from Stanford ,this book makes complete sense and  altough thin in more difficult examples, it is thick in conceptual content. If you dont view the lectures, this book structure may seem kind of odd for a typical QM book.<br>Thank you Prof Susskind and Mr Friedman for taking the time to write this incredible  book.