My number 1 for sure: https://www.amazon.com/Behold-Cryptopreneurs-blockchain-economy-without/dp/107806363X/ref=sr_1_2?keywords=behold+the+cryptopreneurs&qid=1562608022&s=gateway&sr=8-2

No other book outlines the problems blockchain and crypto are facing like this book. Cool that the author suggests how we can collectively solve them too.

This is the best one I've read this year:

https://www.amazon.com/Behold-Cryptopreneurs-blockchain-economy-without/dp/107806363X/ref=sr_1_2?crid=2D47MOUR4791E&keywords=behold+the+cryptopreneurs&qid=1568293317&s=gateway&sprefix=behold+the+c%2Caps%2C219&sr=8-2