Richard Hannay is caught up in another adventure! This time an old friend from South Africa, Haraldsen, is being hunted by evil men with a vendetta against his father. Richard's son, Peter John, is now in his teens and is eager to help his father protect Haraldsen's family, especially since he has a lovely teenage daughter, Anna. After dodging the bad guys all around the city, they escape into the country and make their last stand on the Island of Sheep.

I really love the writing style of these adventure books. It keeps that tension and mystery through every chapter, and we get to experience it all through Richard's eyes. We feel his fear and excitement and despair in each scene, and his relief when they are all safe again.

I found it interesting to hear more about Richard's past in this book. There is a lengthy chapter describing how he met Haraldsen's father in South Africa and how they swore eternal friendship after surviving some tough times together. That bond of friendship continues even after the elder Haraldsen's death, and Richard remains loyal to Haraldsen's family even when it means putting his life in danger.

There is a lot of exciting back and forth in the plot, figuring out what the bad guys want, who is working for them, where they are hiding, and where they are likely to attack. It was cat and mouse for most of the book, until the good guys finally decide that they are sick of running. They make a desperate last stand on the island, but it is the teenagers who ultimately discover the clue to saving them all.