When cars go missing in the Mines, Thomas and Percy think they have a perfect adventure for the Biggest Adventure Club. Their search takes them under waterfalls, into unknown tunnels, new Crystal Caverns and face to face with a mythical Mine Monster!

When a courageous mouse goes for a stroll in the woods, he must outwit a series of predatory animals, including a fox, snake, owl, and the mighty Gruffalo.