“Astromonkeys!” in Jim Baen’s Universe Vol 1, #1
“Astromonkeys!” can also be heard as a podcast on Escape Pod
“Double-Secret Weapon” in Jim Baen’s Universe Vol 2, #4
“Out of His League” in the Australian anthology Daikaiju! 3: Giant Monsters vs. The World
“No Love for the Middleman,” a related story not starring Digger, was published by Strange Horizons
The good news is that you don’t have to go hunting around for all the stories now. Digger Breaks Through! is an anthology that collects all the published Diggerverse stories in one volume, along with three previously unpublished stories. It’s available for only $2.99 at Smashwords or on Amazon for the Kindle.
Or if you prefer print to pixels, you can buy a paperback version from my Createspace store for $7.95 here.