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Thank you very much for the open book. It is very helpful! But I cannot find Chapter 1 in the pdf downloaded. So Historic ciphers/Terminology used throughout t

Thank you very much for the open book. It is very helpful! But I cannot find Chapter 1 in the pdf downloaded. So Historic ciphers/Terminology used throughout the book are missing. Can you please check it out?

mcpherrinm 6y ago
This book isn't finished yet; there are still pieces missing. The authors have been publishing updated versions occasionally over the last decade as more of it is written.