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preface.asciidoc

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 This book is mostly intended for coders. If you can use a programming language, this book will teach you how cryptographic currencies work, how to use them, and how to develop software that works with them. The first few chapters are also suitable as an in-depth introduction to bitcoin for noncoders—those trying to understand the inner workings of bitcoin and cryptocurrencies.
 
+===About Early Release books from O'Reilly
+
+This is an early release copy of __Mastering Bitcoin__'s second edition. The text, figures, and examples are a work in progress, and several chapters are yet to be revised for this editionn. We are releasing the book before it is finished because we hope that it is already useful in its current form and because we would love your feedback in order to create the best possible finished product. 
+
+If you find any errors or glaring omissions, if you find anything confusing, or if you have any ideas for improving the book, please email the author and editors at bookquestions@oreilly.com
+
 === Why Are There Bugs on the Cover?
 
 The leafcutter ant is a species that exhibits highly complex behavior in a colony super-organism, but each individual ant operates on a set of simple rules driven by social interaction and the exchange of chemical scents (pheromones). Per Wikipedia: "Next to humans, leafcutter ants form the largest and most complex animal societies on Earth." Leafcutter ants don't actually eat leaves, but rather use them to farm a fungus, which is the central food source for the colony. Get that? These ants are farming!