This is a really excellent book that I would whole-heartedly recommend to anyone looking for an introduction to quantum mechanics and relativity. It is written in an engaging style. Not only are concepts explained clearly and concisely but they are peppered with historical anecdotes and interesting diversions. The footnotes in particular are a joy to read. Another big bonus is that there are many problems along with full worked solutions. This book not only treats the subjects of quantum mechanics and relativity well, but goes on to show how they can be combined leading to field theory and the hot research topic of quantum information. All in all, a great read.