"E-Myth - Revisited" is very good as an "operational handbook". Basically "systematised" everything and don't do "special request/things" for customers, since most of the time they are not repeatable by other branches or members of staff and get buy-in (for your vision) from your employees. There are many more practical lessons in there.

I went through "Running Lean" by Ash Maurya after reading Lean Startup, and it's a lot more practical and full of examples that can be applied in your own business. Only thing is that it's more oriented at consumer startups, so for B2B SaaS I'd recommend "The Startup Owner's Manual" by Steve Blank.

Disciplined Entrepreneurship by Bill Aulet.

He’s actually had a couple of exits which can’t be said for most authors in the space.

Running lean is probably a lot better.