The book contains interviews with some luminaries. The book was published 5 years ago and this fact makes it clear that:
1) Five years is tremendous amount of time in modern world - many of the “hot” languages of those days are abandonded nowadays (Perl 6 is probably the most prominent example).
2) Five years is a surprisinly small amount of time in the modern world - as I managed to learn just 1 new language among a dozen of hot new languages.
3) Computer science is more than just pushing buttons as fast as you can, as the book demonstrates clearly that there are some “fundamental” ideas related to the development of programming languages.
Most importantly, those ideas require knowledge of math, psychology, sociology, linguistics, etc. This is why “perfect” language is still to be created. The book will stimulate your interest in learning programming languages, which can be beautiful sometimes.