I have always liked the city and the country, having spent time as a child in both. I always wished they could be combined, with all the stores, movies, cars, and activities of the city merging with the perfect wonder of the deep forest. Wouldn't it be nice to have a house whose front door opened on the city, and whose back door opened on a forest primeval! So I made such a house in this novel. From the front it is surrounded by the city; from the back it is surrounded by untouched forest. Magic? No, merely science: the house has portals that open onto other parts of the world, or even other planets. What a challenge it would be to discover the secrets of such a house. So I have a family, retirees who soon realize the house is beyond their capacity to handle and call in expert assistance, their grandchildren, Lloyd and Llynn. The kids' parents are happy to have them off their hands for a summer; L and L can be wild. But they quickly fall in line when they realize the grandparents will send them home if they don't behave. Meanwhile, nobody tells anybody outside what they are exploring; it's a secret they keep lest there be unwelcome attention. So what does explain the mystery of this remarkable piece of realty? Ah, read the novel and find out.