The Girls Who Disappeared By Claire Douglas

Three girls missing.
Twenty years ago: One rainy night, Olivia Rutherford is driving three friends home when a figure in the road causes her to swerve and crash. Regaining consciousness, she finds herself alone in the car - her friends have vanished.

They are never seen again.
Now: Journalist Jenna Halliday visits the close-knit community of Stafferbury to persuade Olivia to talk and solve the mystery of the girls' disappearance. But Olivia won't speak.

What happened? Is Olivia hiding something? Why are the people of Stafferbury so frightened? How many secrets can one small town hide?