My introduction to systems thinking was “The Fifth Discipline The art and practice of the learning organization”, by Peter Senge.
That was a long time ago, and you’ve probably never heard of some of the companies used as examples (People Express?), but if you want to learn to see the systems that exist in and around your business or organisation, and more importantly, how they in interact in ways currently invisible, this is a brilliant introduction.
Forgive the old-fashioned-ness of it, and have a go at spotting and sketching the systems that make a difference to your business.
You’ll soon learn to see things differently.