The Mystery of the Dirty Prize

When his faithful dog Tootsie unearths a filthy silk scarf, Henry doesn't understand why the scarf makes him feel sick. Luckily, there are other mysteries that demand his attention. Searching for treasure in the haunted house, identifying the author of the strange notes at the nature center, proving the existence of poltergeists-anything that takes his mind off the scarf is a welcomed distraction for the young detective. But The Mystery of the Dirty Prize cannot be ignored forever.
With the help of new friends and with Tootsie and a lively banana addict at his side, Henry delves into the puzzling questions that crop up around him. The clues are there. Henry just needs to observe them, then let his unique mind that works best at night do its thing. As clues surface and evidence mounts, can you solve the mysteries before the mid-night sleuth does?