Coyote Cal's origin story is included in the latest issue of Plasma Frequency Magazine, and you can download your free Kindle, ePub, or PDF copy right here. There's also a print version for sale, if turning actual pages is more to your liking.
Young Calvin had something of a Tarzan / Mowgli-like upbringing, and in this tale, he's haunted by a force that desires to twist him to its will. I've mentioned before that I learn about my characters as I write their stories, and "Boom Town" was no exception. I always had a vague idea in the back of my mind about Cal's early years, but fleshing them out a bit was a whole lot of fun.