Daniel has appeared numerous times in Gardner Dozois' The Year's Best Science Fiction anthologies. He has authored five books and numerous short stories. The novels Metaplanetary and Superluminal are part of a series, based upon the short story "Grist."
Daniel is an editor at Baen Books. He currently lives near Dallas, Texas with his wife Rika and children - Cokie and Hans. He was a lecturer in science fiction as literature and graduate writing at the University of Texas at Dallas from 2006-2011. He was also senior story editor at scifi.com's Seeing Ear Theater from 2000–2002, where he wrote, produced and directed several productions.
His short story "Life on the Moon" was nominated for the Hugo Award for Best Short Story in 1996 and won the Asimov's magazine Readers Choice award for that year.