You could accuse me of some bias here: I'm a big fan of Mary & Tom's books, and Tom wrote the forward for my book. But I assure you, my fully objective opinion is that this is an excellent text.
It differs greatly from their prior work primarily in that LLSD takes more of a systems tone: in fact, the "software development" part of the title is too much of a constraint. I'd recommend this book to anyone responsible for delivering value to clients, in any industry.