Indeed mastering Bitcoin is one of the best book out there by Andreas and which takes you to to the Bitcoin journey and explain every topic in detail and in simple terms.You can be a newbie and have no knowledge of Bitcoin but after you read this book you will Gain enough knowledge of the bitcoin network like how transaction are prompted and how address are generated and all technical aspects.So it's under must read category.
Anything by Andreas is generally quite good, and that's not exclusive to his books, but his talks, and videos that hes done. He's probably contributed to Bitcoin adoption more than hes given credit for. I'm also sure he's encouraged, and influenced several new developers about using the Blockchain.