High school seniors Aria, Emily, Spencer, and Hanna barely survived their most recent encounter with A. And it''s not over yet . . . The police don''t believe that the real A is still out there, but the girls know what - and who - they saw. If they don''t track down this final tormentor soon, A will silence them forever.This penultimate installment of the beloved series is full of juicy scandals, dark secrets, and shocking plot twists that will prepare readers for the jaw-dropping series conclusion in Pretty Little Liars No 16.