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README.md

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-# blockchain-book
+# Learn Blockchain by Building One
+
+This is the full source code for my book, [Learn Blockchain by Building One](https://www.amazon.com/Learn-Blockchain-Building-Understanding-Cryptocurrencies/dp/1484251709/ref=sr_1_3?crid=1TB6LKK9INSJC&dchild=1&keywords=learn+blockchain+by+building+one&qid=1613493701&sprefix=learn+blockchain+%2Caps%2C144&sr=8-3) (Apress / Amazon).
+
+Please submit any issues found in the code here: https://github.com/dvf/blockchain-book/issues
+
+And if I haven't responded to them, please get my attention at hi@dvf.nyc and I'll do my best to help you out.
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+# The Code
 
 The finalized blockchain is located in /chapters/chapter_7.