While searching in Iceland for a missing sailor sought by an insurance company, the teen-age detective brothers uncover a plot threatening the life of a United States astronaut and the secrets of NASA's moon project.

"A girl grows up visiting Snæfellsjökull, the glacier near her home, but when preteen life throws her off-center she must reconnect with her icy old friend"--

There is a legend that if the ravens at the Tower of London ever leave then Britain will fall, so when somebody steals the birds, the Queen calls for Mac B. to find the thief and retrieve them--a mission that takes him to Iceland, where he encounters secret submarines, hungry polar bears, and his arch-nemesis from the KGB.

The women of one village in Iceland decide to plant trees to stop the powerful winds that make it difficult even to go for a walk, but first they must find a ways to prevent sheep from eating all of their saplings, while encouraging chickens to fertilize them.