Is there a database with book notes somewhere?

Question

Database

Well, not to read 500 pages when there is no time, but to learn the main ideas

Answer 1

briefly.ru/

Answer 2

For books in English, you can often find Wikipedia articles with a summary. For the Russian Wikipedia, this practice also exists, but on a much smaller scale.

Answer 3

For business literature, I really liked the summaries from the Moscow Business School. Available on the root tracker - In audio form and txt / pdf