Sit ‘n Go Strategy by Collin Moshman is a must-read for beginner to intermediate players looking to master online Sit & Go (SNG) tournaments. The book breaks down early, middle, and late-stage strategies, focusing on hand selection, aggression, and adapting play based on stack sizes. It emphasizes a shifting strategy suited for fast-paced SNGs, making it a valuable guide for those aiming to crush small to mid-stakes games.