Reading an entire book takes 8 to 12 hours on average. Multiply that by the dozens of titles you'd like to explore each year and you end up with a multi-year part-time project. The result: most people give up and settle for superficial summaries scraped from social media Twitter threads, LinkedIn carousels, 90-second TikTok videos reducing a 400-page essay to three punchy lines. The general knowledge that follows is an illusion: you retain slogans, not reasoning.
A structured summary changes the game. When done well, it extracts the main ideas, the most striking examples, potential objections and the actionable conclusions. It doesn't just list the chapters it reconstructs the internal logic of the book. You gain breadth without losing what makes a book valuable: a thesis, a line of reasoning, applications. The difference between a bad summary (which paraphrases) and a good one (which synthesizes) is the same as between a Wikipedia entry and a critical essay: one tells you what to think, the other gives you the means to think.
Cognitive science validates the approach. Research on learning transfer shows that a concept is better retained when exposed several times from different angles than when read once in its original context. A well-made summary acts as a conceptual review: it isolates the central idea and connects it to others, which facilitates long-term memorization.
With Cobalt, the goal isn't to replace reading, but to let you choose what deserves your 10 hours. A well-made summary is often the best filter for spotting the books worth reading in full. Out of 100 books browsed via summaries, three or four truly deserve a purchase and a deep reading. The others will have given you an idea, a figure, a reference and that's already a lot.
This approach also transforms the way you read the books you do choose to tackle in full. With the thesis and structure known in advance, you read more actively: you know where the author is taking you, you spot weak arguments, you anticipate examples. Reading becomes a dialogue rather than passive absorption.
The practical consequence? You develop a cross-cutting general knowledge: you can discuss behavioral economics with a finance professional, quote Epictetus in a conversation about resilience, understand the mechanics of a negotiation without having read all 400 pages of Cialdini's Influence. You make better reading choices because you know what else is out there. And in conversations, you always have something interesting to share not slogans, but ideas.
One last advantage: compressing cognitive costs. A quality summary lets you get up to speed on a topic before a meeting, a dinner, a trip. Three weeks before a trip to Japan? Listen to three summaries on contemporary Japanese culture in 20 minutes. A new tech project launching? Skim the main books on technical team management in an hour. It's less a shortcut than a preparation tool.