I own a small book on Lattice theory published by Dover. Unfortunately, since I bought it almost a year ago, I have gotten nowhere in its study.
What I am asking for are freely available papers that use lattice theory in a substantial way to prove theorems about mathematical objects I am already familiar with and interested in: groups, rings, modules, topological vector spaces, logic, $\dots$ to help me get excited about lattices, and potentially give me a reason to study them for their own sake. Short articles ($\sim10$ pages) are especially appreciated (but not necessary), as are those articles that helped you become interested in lattice theory and convinced you of their utility.
I know this is potentially difficult, as I imagine most 'interesting' applications of lattice theory require advanced material on lattices, but I am willing to take certain theorems on faith, and have several lecture notes on lattice theory saved on my hard drive for reference.