For 2021, KRAD COVID readings is covering the only short fiction I didn’t read in 2020: my novellas for the Star Trek: Starfleet Corps of Engineers series, a monthly series of eBooks that ran from 2000-2007. I’ll have a new reading every #TrekTuesday. This week, we continue Book 2 of Invincible, which was a collaboration between me and David Mack.…