Helen Keltie: 2 books

It has been twelve years since twins Josh and Katie Jenkins were unwittingly propelled into the underwater world of Otriana while searching for their neighbors dog. After meeting Nepta and his sister, Coralie, who help the twins escape Otriana, their adventures eventually lead them to be accused of...

The Mysterious Lake is an underwater adventure of ten-year-old twins Josh and Katie, who are searching for their neighbours little terrier, Miffy. By accident, they fall into Otriana, an underwater world, and meet Nepta, a boy about their own age, and his sister, Coralie, who is much younger. With...