One of the great pleasures of a summer holiday is sitting in the sun and reading a book. A book I'll be reading on the beach this summer is 'Death on a Longship' by Marsali Taylor. In the book, yachtswoman Cass Lynch has just landed her dream job: she’s the skipper of a replica Viking longship in a high-profile Hollywood film, starring the famous actress Favelle. It takes Cass back to her native Shetland Islands, and the father she’s barely spoken to since she ran away to sea