I discovered Christopher Mills back in my early days with Comic World News when a now-defunct website called AdventureStrips.com was nice enough to give me a comp subscription for review purposes. AdventureStrips specialized in pulp stories and I loved pretty much everything I read there, but a couple of my favorites were Gravedigger and Perils on Planet X, both by Mills.
Gravedigger is an excellent, hard-boiled crime thriller, illustrated by Rick Burchett, that's been collected into a one-shot print edition by Rorschach Entertainment. Perils on Planet X, illustrated by Jon Plante, was unfortunately never finished, but worked for me in ways that its inspiration, Edgar Rice Burroughs' A Princess of Mars, never had.
Mills' current work includes an online, pulp strip called Supernatural Crime that stars characters like Femme Noir, Brother Grim, and Nightmark. As Mills says on his site, "Blazing roscoes, weird menaces and dangerous dames... Who says they don't write 'em like this anymore?"