Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A good Register with a good Historical

The Glogal Internet Trust Register, as the name says, has lots of registers of public keys, but besides it, there is a historical which describe the attemps of Government to licence the cryptography and other proposes. It explain the certification authority(CA) even for non-technical people, explain what is 'The Global Internet Trust Register' and other things related with CA. The reason that I liked this book is as I already said, the registers and the historical part, which a learned a lot.