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.