Bad Blood at Rothesay Castle

'I stopped and waited, straining to hear. Silence. No, there it was again. Thump, drag, thump, drag. What was making that unearthly sound?' A party of American tourists arrive on Bute, eager to discover any connections to Stuart ancestors. But someone in the group has a different agenda - one that will lead to murder - and Alison Cameron is once more involved in a mysterious death and danger for herself and her friend, Susie.