This sequel to Out of the Clouds continues the enchanting story of the Coggins family. Pa is off to work again leaving his family behind in their hidden clifftop home, Dizzy Perch. Oliver is in charge with strict instructions about no visitors (to protect Pa's top secret work!) but Ma doesn't listen, and invites her favourite author to stay. When a woman arrives at Dizzy Perch claiming to be said author, the whole family is enchanted by their new guest... all except for Oliver! And it's a good job too, because the woman is really the sister of Pa's sworn enemy, Mac, and is on a mission to bring Pa down and steal his top-secret research!