A thrilling adventure begins unexpectedly for Colter on the first day of summer vacation. Marooned on a broiling city sidewalk, on the hottest day of the year, he finds hope in an ad in the back of a comic book. It promises to send a special rock, for free, that you can plant in your backyard. It will grow into a massive mountain almost no one else can see — with rushing streams, deep mossy pools, towering evergreen forests, and lofty, cathedral-like granite peaks covered with snow. Colter thinks it sounds like a scam, but curiosity makes him send for it anyway. Everything the ad promises comes true!
