Fear the Worst, Linwood Barclay

Seventeen-year-old Sydney Blake's summer is shaping up to be typical for a teenager: she's spending it with her father, and she has landed a part-time job at a local hotel.

One night, Syd fails to come home from her shift, and her father Tim is a bit alarmed. However, that alarm turns to full-on panic after he visits the Just Inn Time hotel and the manager claims that Syd has never worked there. Grilling his daughter's friends for clues leads Tim nowhere - except to threats against his life - and as he frantically chases every lead, he can't help but wonder if Syd is even still alive. Despite a growing list of unanswered questions, all Tim knows for certain is that he must continue searching for his daughter - no matter how high the stakes become.