‘The Umbrella Man’ was my introduction to the delightful world of Roald Dahl. After that I never skipped a chance to read Roald Dahl’s book – and honestly, I did not like all of them equally. But I do believe that Roald Dahl is the master of short stories, especially the creepy and macabre ones. ‘The Best of Roald Dahl’ is a collection of outright creepy stories. You browse along happily page after page and…