Good primer on everything related to crypto currencies, how they work, which ones are popular (at the time of publishing) and what the future can bring.
(It's scary to see how lots of currencies mentioned don't matter anymore--shows you how volatile the market is.)
The author carries that rebellious streak throughout the book which I dig.
DON'T read it if you already know the basics, because this book was clearly written for the noob.
'Nuff said.