With a secret code and a magnifying glass from his new spy kit, Henry is all set for a great spy adventure. His dog Mudge is a master of disguise in his spy hat, and together they"re traveling incognito, ready to flirt with danger. When a mysterious note gives them their first clue, the two best friends set out on the trail to a priceless discovery. Full color Ages 6-8. Pub: 2/98. .