All three River City novels (Under a Raging Moon, Heroes Often Fail, Beneath a Weeping Sky) are now available as eBooks via Smashwords...and as the next few weeks pass, they will be available wherever eBooks are sold -- B&N, Amazon, you name it.
I've also put together a pair of River City anthologies for eBook distribution. The Cleaner and No Good Deed both contain more than a dozen short stories, all set in River City. Many of the characters are those you'll recognize from the novels, albeit in smaller roles. Some are new. Give them a chance. I think you'll dig it.
I'm not sure if or when these two anthologies will show up in print. I'm exploring a couple of options. Meanwhile, another anthology, tentatively titled Once Upon a Time in River City, will be released in print from Gray Dog Press this Fall. It will contain stories featuring Katie MacLeod, Paul Hiero, Finch and Elias and Dominic Bracco.