Overall this is a good book, filled with all kinds of interesting information. However, I felt that the level of editing polish was poor. Typos and illustration errors are frequent, and the writing style is uneven and awkward at times. It's also clear that the authors of each article did not read the other articles, because the same information is sometimes redundantly discussed in two or three separate articles. What's worst, though, is the number of outright factual errors: a proton does not have neutral charge, the abbreviation for microseconds is not ms, etc. My advice is to wait for the second edition, or buy one of the many similar books from other publishers instead.