I have just finished reading The Lean Startup, by Eric Ries. I had it since 2014, and for whatever reason had not got around to reading it.
I really, really liked it. There are a lot of insights on how to run a company without guesswork – actually testing assumptions about your customers and products. Also, about the power of having quick cycles instead of multi year release dates.
There is actually a lot I've read elsewhere or had in courses, but given how the book was popular I guess that is not surprising. Some of the examples were the same, even.