I'm always looking for books that I can recommend to general parties when they want to know more. Can you touch on the audience a bit more? Is the book appropriate, say, for a developer who knows nothing about lean to start with? Would you insist on one of your other lean books as a prerequisite?
(I just ordered one copy, I'm looking forward to reading it!)
For a developer who wants to know more, Jim Shore's book would be a good one, but Leading Lean Software Development is one to recommend to the managers in an organization which is starting off (or even well along) with an agile implementation. It tells them what is expected of them to help make the agile implementation successful. These managers don't need to know much about lean, agile, or even software development (although that would be helpful!) to get a lot from the book. If you have an environment where agile is working at the development level and you need to get more support from managers and customers, this is a good book for them.
Author of Lean Software Development, Implementing Lean Software Development, and Leading Lean Software Development