[sivers]

I kept my book notes private for years because I assumed it would violate some copyright law to post them.

But one day I tried it anyway. Kept it quiet. But after years, people kept discovering it.

Now the authors contact me thanking me for highlighting their book. And publishers offer to send me new books asking to be included in my list.

So... I guess they don't mind!

I think if you encourage people to buy the book, and aren't trying to replace the book, nobody will complain.