This manual is a thorough examination of the subject that will teach you what Read-only Reentrancy is, how to detect it, and how to effectively defend your project and users against it! — Greetings, dear readers! We continue our series of educational articles and today we’ll look at Read-Only Reentrancy Attack — one of the attacks that used to be very common in the Web3 smart contract-based projects, but has recently been relegated to the background, although they still pose a great danger!