Longlisted for the Highland Book Prize 2019The School Ship Tobermory and its intrepid young crew are back in Hebridean waters. When a violent storm blows them off course to a remote island, they discover a fisherman's journal written a hundred years ago which tells of a mysterious shipwreck crammed with treasure.But without a precise location, where do they start looking? An extraordinary chance encounter gives them a valuable clue. Before long, Ben, Fee and their friends realize they are not the only ones searching for the lost wreck and must face a ruthless and determined adversary who will stop at nothing to seize the prize.

Alexander McCall Smith is the author of more than 80 books, including the No. 1 Ladies' Detective Agency series, and 44 Scotland Street. He is one of the world's most prolific and popular authors, and his books have been translated into 46 languages.Iain McIntosh's illustrations have won numerous awards in the worlds of advertising, design and books. He has illustrated Alexander McCall Smith's 44 Scotland Street series and also the series of children's stories featuring Precious Ramotswe.