The book was developed during a 58-day marathon session of laying out the book and then drawing/printing the pages with a 0.7 mm mechanical pencil. It was then necessary to develop and test each of the 100 circuits. Each circuit was built and tested at least three times to avoid errors. The final round of tests was done directly from the hand-lettered text. The problem with the final testing was that many of the circuits could be built from memory without referring to the circuit diagrams in the book. This, of course, could have allowed errors to slip through. So it was necessary to check off each connection to make sure the book version was correctly reassembled from scratch.

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