The book gives a streamlined introduction to quantum mechanics and describes the basic mathematical structures underpinning it. From the reviews: "This book is an introduction to the mathematics of quantum mechanics....The strength of the book is where it shows how the mathematical treatment of quantum mechanics brings insights to physics....It will be useful to the experienced reader as a guide to the impressive recent advances in mathematical quantum mechanics." --SIAM REVIEW
Partial reading on chapter 1-5 and 9.14. I was mainly interested in basic notion and quick introduction to bounded operators, self-adjoint operators, unitarity, spectral mapping, trace class operators, etc and less so on actual quantum mechanics of scattering states etc. It turned out useful for those chapters, because it got me into what I wanted pretty quickly and less daunting than swallowing a graduate text in mathematics (which may be useful if I have time and need dedication for it). May revisit again one day.