The title does not properly reflect the contents. The book is actually a carefully written introduction to the features and design of OS/2 Warp (for the PowerPC) that a user of the operating system would be interested in knowing; threads are not an important part of the book.

What this book does is to treat the characteristics of this operating system clearly but superficially. The writing is lucid and carefully done, which is saying something, since books that treat an intricate technical subject like a real operating system have a hard time avoiding jargon and poorly defined terms.

The audience the author has in mind would be an application programmer or manager who wants to learn about the features that OS/2 Warp makes available to the software writer. The level of detail is not sufficient to learn how to use the feature; rather, it is an introduction to the terminology, so that one would know what to ask for in order to dig deeper. A random example from the text gives a fair idea of the lucidity and level of detail that characterize the book:

CUA (Common User Access) is a piece of IBM’s Systems Application Architecture (SAA). CUA defines a set of guidelines for how applications should present data and interact with users.…

An example of CUA is the guideline on how a menu should behave when selected. An action bar item, when clicked upon, should not cause execution of an action but should only display a pulldown (p. 156).