Some good eBooks?

I liked Ready, Fire, Aim - reveals how priorities should differ between small biz vs. big biz. However take it with a grain of salt as it's written more from a sales perspective than a product perspective which folks like Sam Altman are more focused on. Sam's comments on product/successful startups: https://www.youtube.com/watch?v=0lJKucu6HJc

Currently reading Rework,
it's great has many sections on each field of running a business, like marketing, innovation, hiring, etc
The authors are real founders. they bootstrapped and went pretty big their company, and whats good is that Mark Cuban recommended it too