This is a well laid out and well presented book, with plenty of good advice. The advice is, as far as I can tell, being given by experienced and well qualified people and should be very helpful for anyone preparing for a job interview (or several job interviews).
Unfortunately you could get all the same advice, and more besides, by doing an internet search on 'job interviews' or scanning through a few relevant web sites. Lots of recruitment and employment websites offer advice along the same lines as the content of this book, but unlike the book it's free, so you may be better off just searching the web.
The book does at least collect the advice together into relevant sections, in a logical order and present it in a manner which makes it easier to take in. If you're prepared to take the time to sort through information from two or three web sources and put up with a bit of duplication you'll probably find that the internet search method is a lot cheaper and returns a wider range of information than this book.