Prompt: your list of auto-buy authors
It's not actually that long a list, but here we go:
Martha Wells has been a must-buy author for me for years now; I first stumbled onto her when I was working in a bookstore and purchased her City of Bones, then went back and picked up The Element of Fire, and I've purchased pretty much everything she's written since then.
Lilith Saintcrow is next on the list; I first encountered her when she was being interviewed about her Bannon & Clare books -- mad science, magic, and mayhem in Victorian England, with some particularly intriguing worldbuilding -- which I immediately purchased and read before diving into her entire backlist. I'm still not sure I'm 100% caught up, but I do my best.
I found Ursula Vernon under her nom de plume of T. Kingfisher, in the delightful fantasy short story Nine Goblins, and I've been hooked ever since. Disturbing horror, cozy romance, a good many stories that are a mix of both.
Finally there's John Scalzi, whose particular flavor of cheerfully deranged science fiction adventure has done a very great deal to cheer me up at various points where I needed to be reading something that could do that. I'm not sure where I first ran into his work, but after The Kaiju Preservation Society I'm pretty well locked in.