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.