In Virtual Intruder, Lizzy’s rising popularity on social media attracts a sinister stalker who seems to know far too much about her life—and her family’s hidden secrets. Lizzy’s fear grows as the stalker escalates, forcing Kyle and Nick to step in, each using their unique strengths to protect her and uncover the truth. Together, the siblings engage in a suspenseful digital cat-and-mouse game, confronting a modern threat that’s as personal as it is terrifying. This book adds a psychological edge to the series as Lizzy and her brothers face the dangers lurking behind every screen.