I wrote The Christmas Monster of Ripple Rock about a stretch of Seymour Narrows called Ripple Rock, an underwater mountain that had two peaks below the surface in Discovery Passage in British Columbia. Only 2.7 metres (9 feet) underwater at low tide, it was a marine hazard. Boats not only hit the rock itself but were also sunk by dangerous eddies and tidal currents. Ripple Rock was blasted by a planned explosion in April 1958. This was a National Historic Event in Canada, broadcast live on CBC Television.The story itself takes place in the child’s imagination – when their little skiff comes dangerously close to a huge ship on Christmas Eve.