One of the books that made me realize how powerful Lean principles are in a software development environment is the book Implementing Lean Software Development by Mary and Tom Poppendieck.
The principles written in this book comes directly from the Lean principles defined by Toyota, going all the way back to 1930. No need to say, but it goes perfectly well if you are in a journey of Continuous Improvement with Product Teams.
I created this Infographic based on the book, creating a summary of what you should focus on when creating or supporting Product Teams:
What principles usually you see missing in the Product Teams?