Staying on top of the fast moving Smart Contract security landscape is as important as learning the basics through books, blog posts and tutorials.
The "OpenZeppelin Blog" is a great way to learn about recent developments in the security space. You'll definitely don't want to miss their blog posts on <a href="https://blog.openzeppelin.com/security-audits/">security audits</a> as they give you an opportunity to learn about the auditing process as well as security vulnerabilities and potential exploits.

OpenZeppelin's official Blog about Blockchain- and Smart Contract security.

OpenZeppelin Blog

The team at PeckShield does a great job at dissecting recent hacks and consolidating all their findings in easy to digest blog posts.
When reading such posts you'll learn about the big ideas behind the hacks, how they can be translated into code exploits (and where to inject them) and how you can be a forensic yourself by tracking them down in your favorite Block Explorer.

Peckshield's Blog about Smart Contract security.

Peckshield Blog

Browsing through Yos Blog you'll find very useful in-depth articles about Ethereum and Smart Contract development with Solidity.
Topics covered are Smart Contract testing and development best practices, Decentralized Finance (DeFi) with its underlying algorithms and economics as well as Web 3 in general.

In-depth articles on Ethereum, Smart Contract Development and Blockchain-related topics.

Blog

OpenZeppelin Blog

Peckshield Blog

Yos Riady's Blog