Penny Nichols and the Knob Hill Mysteryby Joan Clark Joan Clark (née MacDonald) (born 12 October 1934) is a Canadian fiction author. Pages of Penny Nichols and the Knob Hill Mystery : Page 1Page 2Page 3Page 4Page 5Page 6Page 7Page 8Page 9Page 10Page 11Page 12Page 13Page 14Page 15Page 16Page 17Page 18Page 19