[garrettr_]

Cryptography Engineering [0] is a great book that covers key topics in cryptography with a focus on best practices for implementors and system/protocol designers.

Matthew Green's blog, A Few Thoughts on Cryptographic Engineering [1], has a wealth of interesting posts that are often aimed at explaining cryptography to a "technical but non-cryptographer" audience, and tend to be motivated by recent events in security/cryptography news.

[0]: https://www.amazon.com/Cryptography-Engineering-Principles-P... [1]: https://blog.cryptographyengineering.com/