This book is, bar none, my favorite book for investing in cryptocurrencies. It doesn't bog you down with technical jargon, but instead focuses on all the elements you should understand before you invest.
It's a comprehensive book for both beginners and experts. Beginners will find information about major cryptocurrencies (not just Bitcoin) as well as details on historical market events (that you can draw on for future) and events to watch for moving into the future. Experts will find the chapters on valuation particularly useful. For those of you involved in traditional investing, this book is even more of a godsend as finance info is explored (correlations with other asset classes, ETFs, etc).