I read most of D. Self's books, if not each and every one, and old Wireless World projects too.
I think this book is not quite as stellar as the other brothers, like those of the Audio Power Amplifier saga.
I actually expected quite more in-depth analysis of peculiar topics, like microphone preamps or PSU's, digging into each and every detail of the circuits as the Author did for every single stage of power amps, with lots of Audio Precision and PSpice usage.
Anyway, I think this book is worth having because it contains a lot of info on a lot of topics - it's a book of more than 400 pages, after all - only some topics have undergone a deeper analysis than others.
I must notice that one page was severely damaged, probably right from the printer.