Firstly, please ignore the bad reviews of this book.
Secondly, please understand the importance of this book.
This is a historical text. It wasn't in fact written as a book, but was a collection of articles written in The Jinx magazine, but Theodore Annemann, during his prolific reign in the 1930's.
Annemann was a ground breaking performer in the field of mentalism and whilst I agree that many of the described acts are dated now, it must be understood that when these effects were first produced in the 30's, they were groundbreaking works.
The mistake that could easily be made is to write this off as an outdated body of work that has no bearing on today's magic. Indeed I would think that any of today's performers of mentalism would agree that many of the routines described in the book, have formed the foundation of many acts currently being performed?
Saying that, if you only have a casual interest in this area, or you're just starting to look into this area, then this historical document may seem a little inaccessible. To this end, I would strongly advise you start with a more accessible work like Derren's Brown masterpiece, 'Tricks of the Mind'.
If you are serious about your craft, then I would definitely recommend this book as a research piece.