The Night She Disappeared by April Henry
Gabie delivers pizzas in her mini cooper. And when Drew takes the order that night, the man asks for the girl who drives the mini. But at Kayla's request, the two girls had switched shifts. So Kayla is the one making the delivery...and the one who gets kidnapped. And Gabie doesn't believe the police for a second when they tell her that she wasn't the target, and she cannot stop thinking that whoever has taken Kayla is still out there looking for her.