Ages 10 and up It's elementary-there's no more intriguing detective than Sherlock Holmes, with his unequalled powers of deduction, and no better mysteries than the tricky ones that only he can solve. Here are some of the finest Holmes stories, recounted by his trusty friend and assistant, Dr. Watson. The illustrations for this series were created by Scott McKowen, who, created these drawings in scratchboard - an engraving medium which evokes the look of popular art from the period of these stories. Scratchboard is an illustration board with a specifically prepared surface of hard white chalk. A thin layer of black ink is rolled over the surface, and lines are drawn by hand with a sharp knife by scraping through the ink layer to expose the white surface underneath. The finished drawings are then scanned and the colour is added digitally.