Today begins a new edition of our blog feature “Variations on a Theme,” in which we devote digital ink to a topic that fascinates us. This week, it’s money.

Every weekday morning and at various points throughout the week, Reader staffers will produce a post—a personal essay, a longer-form reported story, a photo gallery, or something more off-the-wall—on the week’s theme.

There’s no shortage of conversations surrounding money these days, but we went with that topic since it’s also the theme we chose for our fifth annual photo issue.

And in case you missed it, here’s all the “Variations on a Theme,” we’ve done thus far: