: IS: Didos younger sister, Is Twite, has gone north to try and find her lost cousin but instead of the promised Playland, she finds an underground kingdom where children work as slaves in the most appalling conditions. COLD SHOULDER ROAD: Rumours are rife about the mysterious disappearance of Arun Twites mother from Cold Shoulder Road. He and Is, his cousin, set off to discover the real truth and are overtaken by extraordinary and fast moving events.