This is a 236 page book. The first 106 pages describe the author's preferred method of making PCB's using photo sensitized boards. Other DIY methods are mentioned in passing and rejected as being flawed. The next 118 pages describe the workings and construction of a data logger that the author's company makes. The final 12 pages are the glossary and index. If you're into building the author's data logger you've got the right book but for reading a thorough description of PCB methods (as the title and ed. review would lead you to believe) I believe you'll be disappointed. Bait and switch.