If you have the mathematical chops to absorb the material, this is a very good introduction to quantum mechanics.  Unlike a lot of popular treatments, this one does not shy away from using mathematics to describe its subject.  Technically, you do not need much more than high school algebra since the author does a good job of explaining the math he does use, but it would not hurt to have some college or AP level math courses (linear algebra and calculus especially) under your belt.  Ironically, this approach seems to make the material more understandable.  Most of the popular treatments gloss over the math, which leaves some pretty substantial holes in their explanations (Feynman's QED is a notable exception).<br><br>A comment about the Kindle edition:  Most Kindle books with math are horrendously formatted.  This book is an exception.  The equations are not microscopic (which is usually the case), nor are they enormous (which also happens rather frequently).  I have noted that depending on the particular Kindle device you use,  there is still some variation in the quality, so your mileage may vary.  Just so you are not confused, this comment only refers to the Quantum Mechanics volume of The Theoretical Minimum.  The first volume, surprisingly, is not so well formatted.