When Tonya and her friends decide to sail around the world they want to see exciting things and visit exciting places. But one day, they meet an orca - a killer whale - one of the most dangerous animals in the sea. And life gets a little too exciting.

The Oxford Bookworms Library offers high-quality storytelling and a great reading experience, with a world wide range of classic and modern fiction, non-fiction and plays. Bookworms include original and adapted texts in seven carefully graded language stages (Starter to Stage 6), which take learners from beginner to advanced level.