This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I don't consider Lean to be a process, but a relatively well-established way of thinking about things that can give people an interesting perspective on the process of software development. Having read the thread you pointed to, I suspect this is not what you are looking for.
Author of Lean Software Development, Implementing Lean Software Development, and Leading Lean Software Development