Inspired by a passing circus: in this Famous Five book, the children hire two caravans and horses and head off to Merran Lake, to join the circus folk there - including their new friend, Nobby and become surrounded by a picturesque environment and long lasting days of glorious sunshine. The children and Timmy are thrilled to be so close to such interesting and unusual people, but are later disappointed to be forbidden to go anywhere near the camp, by Nobby's unfriendly Uncle Dan (known as Tiger Dan) and his friend Lou. Why are Tiger Dan and Lou so anxious to keep them away? Find out by reading this fifth gripping Famous Five adventure.