Your thoughts. What you know about Lean UX.
And Jeff Gothelf. Here’s a good start:
I second @leonbarnard on this one and +1 for Jeff Goffhelf. His book by the same name extended some of the Lean Startup thinking. That book was a game changer for me and I happened to read it at the same time as Erika Hall’s Just Enough Research. I also did a Lean & Agile Day at Usability Week with the Nielsen Norman Group a couple of years ago. There is a good article here https://www.nngroup.com/articles/agile-not-easy-ux/