A new virtual-reality theme park goes haywire on a crowd of young ­­victims, er, visitors in Alexander's latest screamfest.Having scored one of just 100 coveted preview tickets to a cutting-edge, kids-only venue dubbed ESCAPE, budding amusement park fan and designer Cody Baxter is looking forward to a life-changing experience. What he gets is more of a life-threatening one, as games and rides with names like Triassic Terror and Haunted Hillside not only pit him against a monster and then zombies-or sometimes a monster and zombies-as well as ruthless competing players, but seem tailored to play on individual personal terrors. And, in some never explained way, the VR quickly turns into real battles that inflict real wounds even as the real settings shift with sudden, dizzying unpredictability. Teaming up with loyal new friends Jayson Torn and Inga Andersdottir, the former described as being Japanese and White and the latter as Norwegian, Cody (who seems to default to White) struggles for survival, learning ultimately that ESCAPE was created by an evil genius with an ulterior motive who is convinced that he can teach children a salutary lesson. The plot's no more logical in its twists and contrivances than the premise, but the author's knack for spinning out nightmarish situations is definitely on display here as the tale careens toward a properly lurid outcome.Thrills galore for gamers willing to go along for the ride. (Light horror. 9-12)