Mr. Riddle Man - a name shrouded in mystery. Renowed by many to be the world's foremost puzzle expert, he is often called upon to solve the world's toughest conundrums - and none have stumped him yet. Despite his world-famous status, no one knows his true identity. That's all you know about the man - at least all you did know, until a ... puzzling set of envelopes arrived at your doorstep this morning. You notice a letter lying atop the envelopes.