In this hardbound edition of book 25 of the new series, Tom Swift is approached by a rich man with a dream of building a city that can float above crowded cities and land without creating more ecological woes. His dream is a flying platform on which such aa dream town might be built, and he believes Tom is just the man to realize it! The inventor struggles with finding a technology to make this happen before he must tell his benefactor it is "impossible." But, a chance discovery on an Internet site devoted to making fun on crackpot inventors and their ideas sets him on the path to an answer. However, nothing runs smoothly in Tom's world and he soon finds an old foe is out to track him down, hurt or kill him and Bud Barclay, and ruin the HoverCity. Who will win in this multi-battle showdown?