The four members of the Covert Shield Unit (CSU) have only a week to prepare before the Shadow Syndicate—led by the evil Shadow Leader, Zurg—plans to attack. Only the CSU can protect America from the hacking, drone explosions, and takeover of the electrical grid that is planned. Will the kids of the CSU be able to stop Zurg, or will his army of drones be able to take over the world?

— Simon Traub-Epstein, International Library of Young Authors

From the publisher: “America is in danger. The Shadow Syndicate is trying to take over and turn everyone into its slaves. The government is powerless. Luckily, four inventive boys can come to the rescue. Calling themselves Covert Shield Unit, and operating out of a backyard clubhouse, they invent weapons, traps, and gadgets to destroy the Syndicate and try to save the country.”