While this book represents a somewhat useful compilation of information drawn from other sources, frankly the author displays very little understanding of how Tesla Coils actually work. Many of his numerous formulas and graphs are not relevant, and for those that are their relevance is rarely explained.
Many important topics are not even touched upon, such as the necessity to protect the primary transformer's secondary winding against sure RF damage by adding a filter between it and the gap. Also while he correctly states that neon sign transformers are excellent for Tesla coils, he neglects to mention that modern ones are useless because they have built in ground fault interrupters. This not nit picking; rather, overlooking these (and many others) will spell sure grief for any builder.
For the advanced builder there is no mention of how to choose the coupling between the primary and secondary, and the interesting phenomenon of how energy washes back and forth between the primary and secondary coupled tuned circuits for several envelopes before gap quenching takes place. No actual oscilloscope traces are to be found in the book; instead everything is drylabbed. There are too many other instances where the book is incomplete and unauthoritative, except to mention that the author perpetuates the myth that the reason that small coil discharges don't shock you is because their high frequency currents travel over your skin (not...see Wikipedia).
I don't regret buying this book however the TC community has advanced well beyond it and I urge any potential builder to spend time on the web where they will find information that is more relevant, practical, and trustworthy (for example those by richieburnettis.) I understand that my review represents a different perspective than that of some others however I felt these things needed to be said.