Hacking the Blockchain - this detailed guide maps out a gameplan, tools, skills, and knowledge to get started hunting bugs, worth the read

TLDR; link to the full guide at the bottom

From the author, Sleepy...

The focus of this article is to get you knowledgeable about the technology, how these hacks happen, and to provide a roadmap for becoming a smart contract hacker/blockchain security practitioner in the shortest amount of time.

However, it is not meant to be an exhaustive guide, since the technology is still emerging, nor is it meant to teach you how to hack anything. Rather, it is meant to be a high-level overview of where and how to find the information you need, as countless people can teach the technical concepts better than I can. Before we get started, here is the content at a glance:

1. Blockchain basics
2. Smart contracts
3. Foundations: Solidity and Ethereum
4. Exploitation: How companies lose millions with a single line of buggy code
5. Why did I choose blockchain security?
6. Acknowledgements

Full guide is below:

Hacking the Blockchain: An Ultimate Guide