My daughter and I really enjoy these Magic Tree House books. They offer adventure, a plus for kids, as well as education, a bonus for parents. This is the seventh book of the Merlin Missions, where Jack and Annie help Merlin the Magician discover one of the four secrets of happiness. In this book Jack and Annie travel back to the village of Edo in ancient Japan during the 1600's, where they learn about samurai and meet Master Basho, a famous haiku poet. Jack and Annie use their magic wand of Dianthus to bring the Cloud Dragon to the village, helping to save it from burning in a fire. I highly recommend this series. You don't need to read them in order. There is enough back story given in each book to understand what is going on.