Book excerpt: TWO BRAND NEW STORIES! First, in “Dr. Zardox’s Revenge,” Dr. Zardox is a villainous old man with a robot that does his bidding, and he’s got his sights set on Riverdale (let’s be real here: who doesn’t?!). The Crusaders and Superteens will have to team up once more to take him down! Then, in “On the Web,” Veronica Lodge’s new designer bag is gone! Stolen! Will horrors never cease?! Thankfully Wyatt Raymond, aka the Web, is here with his tech and sleuthing skills to reunite Veronica with her prized possession!