The Death Code (The Murder Complex #2) by Lindsay Cummings

With short, fast-paced, alternating point-of-view chapters, The Death Code starts several weeks after The Murder Complex ended. Zephyr keeps the secret about Meadow close—that if she dies, The Murder Complex will be destroyed, too. Meadow, desperate to find her brother, father, and little sister, is determined to fearlessly fight to the end, even if it means sacrificing herself and her friends, new and old. The Death Code introduces a memorable cast of secondary characters and delivers a vivid and scary thrill ride read.