Boffin Boy And The Worm of Death. Set 3, Paperback/David Orme

Wu Pee feels like an adventure, but is far too scared to go by himself. He persuades Boffin Boy to help him find Tickel-My-Tum, a lost city full of treasure. But the terrifying Mongolian Death Worm really doesn't like treasure hunters! When Red Wolf appears there too, Wu Pee's adventure turns nasty.