I wonder whether you could jump onto the Cloud as DevOps person or something? Found a little O'Reilly book on Cloud security, might be helpful:

Practical Cloud Security: A Guide for Secure Design and Deployment by Chris Dotson

https://www.amazon.com/Practical-Cloud-Security-Secure-Deplo...

You mention web security in the title and that normally means web application security, but the body of your question talks about network security. Which of the two do you care about more? There won't be a book that covers both.

For network security—which is what I think you're asking for—I think you will enjoy Practical Cloud Security, by Chris Dotson: https://www.amazon.com/Practical-Cloud-Security-Secure-Deplo...