When your powers fade and the girl you love vanishes, what do you hold onto? Seventeen-year-old Matty Weber is used to being the smartest kid in the room-but this year, the room has changed. His best friend, Gabriel, is drifting away, his grandmother's house is overrun by unwelcome guests, and the prestigious XPAC internship he's worked toward slips through his fingers. Worst of all, Samantha Carter-the girl who once kissed him in midair-has vanished. When an Amber Alert is quietly issued and ignored by most, Matty knows nothing in Scotsbourgh ever disappears quietly. Meanwhile, Samantha's cousin, Tippi, is everything Matty didn't see coming: a polyglot, singer, gymnast, and his new academic equal-or rival. As strange signals echo from Mars, memories glitch, and shadowy figures monitor students from behind planetarium walls, Matty begins to question what's real, what's programmed, and who he can trust. From the starry skies above Santa Barbara to secrets shared aboard a long train ride, Tipping Point explores what happens when the ground beneath a teenager shifts-and nothing can be taken for granted.