Dr. Han­nah Wun­sch is a crit­i­cal care physi­cian and researcher at Sun­ny­brook Health Sci­ence Cen­tre. She is a pro­fes­sor of anes­the­si­ol­o­gy and crit­i­cal care med­i­cine. She lives in Toron­to, Ontario; New York; and Woods Hole, Mass­a­chu­setts. The Autumn Ghost is her first book.