Over the years, I've read many of these stories in various forms, mostly web pages or blog entries by Moran. To have them all collected in one place, polished and ready for market, has been excellent. And there are new stories, too; ones that hadn't yet seen the light of day (or the Net).
For people who haven't read Moran's "The Continuing Time" series, start by reading "Shepherds" in this collection. Then go read the novels Emerald Eyes, The Long Run, The Last Dancer, and A.I. War: The Big Boost, in that order. Then come back this volume and read the rest of the Tales, starting with "LeftBehind" (one of my all-time favorites, and as poignant today as it was when it was first written). Then settle in to wait impatiently for new stuff.