"The Last Polar Bears"Grandfather is off on an expedition to the North Pole to find the Last Polar Bears. With him goes Roo and a golf-bag full of their equipment. The intrepid explorers set sail on the good ship Unsinkable and embark on the adventure of a lifetime.
"The Last Cowboys"
Grandfather and Roo are off to America in search of Roo's long-lost grandfather. According to Roo's stories, he was last heard of living in the Wild West as a cowboy's dog. Will the intrepid explorers manage to find the old dog? And if they do, will they ever get home again?