I got this book out of the library and to be honest I'm glad I hadn't spent money on it. I had finished reading it in 20 mins, and it didn't tell me anything that I wouldn't have worked out with a bit of common sense. There was no detail in the numerous 'step by step' projects: they all seemed to consist of the same set of brief instructions (draw pattern freehand onto item, or copy a template with carbon paper; fill in outlines with pyrography tool; then fill in detail; then colour if desired).
The safety tips might be helpful for some, as would the calligraphy page, showing how to create letters. But I would suggest there are more useful books out there on the subject for your money.