This book doesn't go into too much detail on any single topic, but it gives you a good introductory guide to a useful number of art cocepts, history, and industry jargon (just stuff you only could ever need to know). A lot of the information may seem trivial, but it's all good to know if you are interested in entering an artistic field, regardless of which one.
Content-wise, this book is diverse. There's stuff for printers/publishers, typographers, art historians/teachers, digital graphic designers, photographers, writer/journalists, colorists, iconographers, pretty much any student of art! I will say that there's not that much for painters, sketchers, and other more 3-dimentional artforms, but a lot of the information does come in handy since nowadays, a lot of people use computers to compose graphic art.
Here's a sample of the stuff I learned:
Recto - right page of an open book
Verso - left page of an open book
Tessellation - Repeated layout of a design that doesn't have gaps or overlaps
Ascender - Parts of a letter that extend above the x-height
Descneder - Parts of a letter that extend below the baseline
Art Deco - A style of decorative designs that started during the 1920's which celebrated technology via geometric designs, intense colors, and use of plastic and glass
Canadian Binding - A book binding method that uses a spiral
Moire - Printed patterns produced by colour (CMYK) halftone dots which ultimately combine to reproduce images
Denotation - The literal and primary meaning of an image
As you can see, the kind of information in this book is really diverse; from components of text to composition basics. Some of the stuff is pretty basic, but a lot of times the book adds to a subject something that you either didn't know or don't pay enough attention to.
The book itself is a good piece of art; it not only explains concepts in text, but it also demonstrates them by using graphics (mostly photographs) and comitting an entire page for every topic. I think this is something graphic designers really could use and enjoy having.