Part I explains the rationale of what networks are and why they are built. Part II, the basics, has five lessons ranging from how computers share data to Local Area Network (LAN) and Wide Area Network (WAN) configurations. The lesson discussing Transmission Control Protocol (TCP) and Internet addressing seems a little too technical for someone starting out, however, all sections have good supporting illustrations.
Once you have come to terms with networking basics, Part III is all about designing the layout and putting together the computers. Here is also a general section without any specific recommendations about which types of hardware to look for when building a network. Connecting to the Internet and the use of e-mail are also discussed.
Part IV - on network operating systems - almost blatantly assumes that you will be using some form of Windows for your computers. The hours on Netware and Unix/Linux are far too general to help you make an informed decision about using either. Parts V and VI talk about network administration and the future of networking.
Teach Yourself Networking in 24 Hours is ideal for someone who wants to learn the concepts of networking and build one with Windows computers. People wanting a more technical reference covering the variety of other operating systems should look elsewhere.