Schneier isn&#x27;t involved in cryptography enough today to be able to write the kind of crypto book people would expect. For example he knows very little about ECC, and stream ciphers aren&#x27;t really on his radar either. Also he said on his blog that he&#x27;ll probably never write another crypto book.<p>What do you wish to know? Whatever it is, there are already high quality sources of information out there right now. If you say what you&#x27;re interested in people can point out good guides.