Anyone dealing with XML or java soon runs into Unicode because this is the standard for representing characters in electronic form in those computer languages. Java, for instance, was designed from its inception to use Unicode. Earlier computer languages like C and C++ can have routines added to handle these, while C# uses XML and hence Unicode.
But chances are, when you deal with Unicode, you only deal with a subset. Often only a small subset at that, unless you are using Chinese/Japanese. Typically you work with ascii and the codes for your spoken language if that is not a Western European language. Very few of us deal with much more than this.
Which illustrates the appeal of the book. The Big Picture. ALL of Unicode. The breadth is stunning. It shows the written form of every major spoken language and many minor ones. Has the pictograms for Chinese [of course]. But also the symbols for Khmer, Canadian Aboriginal, Tamil, Syraic, et cetera, et cetera. Thumbing through this, you may encounter languages that you did not even know existed. It is one thing to say that we live in a multilingual world. But it is another to actually see it expressed comprehensively at the most basic level.
There are two audiences for this book. The first is any computer person who has to deal with issues of internationalisation.
But another audience is every Department of Languages or Cultural Anthropology in a university. If this describes your background, then you should know that you do not need facility in computing to appreciate the significance of this book. You can use it as a standard reference, akin to the Oxford English Dictionary vis-a-vis the English language. Look, ignore the computer stuff in the text. Yes, you can do this. The book groups related languages into common chapters. The explanatory text is lucid and the graphics for the languages lets you easily cross compare. Of course, at a higher level of meaning like sentences, you will need specialised texts in those languages. But to understand a language, you need to start at its letters or pictograms.
Think of this book as an index into all the languages of man.