Magic Tree House Merlin Missions: Dragon of the Red Dawn

Merlin the Magician will not eat or sleep or speak to anyone in Camelot. So the enchantress Morgan asks Jack and Annie to help. They must travel in the magic tree house to the majestic world of ancient Japan to find one of the secrets of happiness. They have a research book to guide them and a magic want with three special rules. Will that be enough to help Jack and Annie complete their mission?