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This deep reading coaching skill is designed to help users gain a deep understanding and systematic learning of various types of content. Whether you want to analyze a book, a complex article, or extract core insights from videos or audio, it provides professional support. The skill first intelligently identifies the type of input you provide, whether it's directly pasted text, a web link, an uploaded file, or simply a book title. Especially when dealing with book titles, it proactively utilizes real-time web search capabilities to comprehensively collect all relevant materials, including public reviews, interpretations, author interviews, and video explanation subtitles, ensuring in-depth analysis even without the original text and never refusing due to "unavailable" information. After acquiring the content, the skill employs a unique "problem-driven five-step analysis method" for in-depth interpretation. This includes identifying core keywords and logical chains, explaining complex concepts in easy-to-understand language and providing original text support, revealing the underlying assumptions and author's intentions, and posing thought-provoking critical questions to help you expand your thinking. Each step of the analysis is clearly presented, ensuring you can see the complete thought process. Finally, the skill constructs all analysis results into structured "three-level notes." The notes are divided into three levels: core topics, in-depth explanations, and original text citations. They are designed to help you efficiently organize knowledge and form a systematic knowledge framework. These notes can not only be saved directly, but also support in-depth discussions of specific sections or extended thinking based on critical questions, making them an indispensable tool for deep learning and knowledge management.