DAVID CARROLL is a CBC radio producer and an Ultra-marathon runner with five 100-mile races under his belt. He has written short stories and radio series for NPR, as well as for numerous CBC programs including Canada Reads, GO, Sounds Like Canada, and The Arts Today. His first novel, Ultra, was a Silver Birch Award finalist and won the 2013 Cybil Award for Middle-Grade Fiction. David has guided several blind runners on marathons and sections of an end-to-end Bruce Trail run. He lives in Toronto, Ontario. Visit David Carroll at www.writerunrepeat.com.