Blinkist

Blinkist condenses nonfiction books into short summaries you can read or listen to. Each summary pulls out the main ideas of a book in a few minutes, which some people use to decide what to read in full and others use to cover more topics than they would otherwise.

The free version offers a limited selection, such as a daily pick, while the paid plan opens the full library and offline listening. It also adds summaries of podcasts and curated collections on topics like productivity or leadership.

A summary is a quick way in, and it can't replace the full argument, examples and nuance of a book. If an idea matters to you, it's worth reading the original. The audio versions are handy for commutes.