Highly recommend reading or listening to The Goal. The audiobook feels like a cheesy training video, but sort of in a good way, and the concepts are extremely useful. Plus, you learn the language it is more likely your business counterparts know, as opposed to talking about backpressure or queuing theory, which they may not connect with.
I use the concepts from this book all the time at work to justify a prioritized backlog and defend against a lot of work in process.
+1 vote for The Goal. Our operations research prof showed us the movie in class one day, and it's one of the few things I distinctly remember from my courses. It's teachings are crystal clear to me years later, although unfortunately/ironically I haven't been able to implement it in my life so well.
I use the concepts from this book all the time at work to justify a prioritized backlog and defend against a lot of work in process.