Super Serial...Killer

I'm reading this book by Dean Koontz called Velocity. It's really good so far.

It's about this bartender named Billy who starts getting these strange notes. The first one said that if he took the note to the police and got them involved, an elderly woman involved in charity work would be killed, but if he didn't take the note to the police, then a lovely blonde schoolteacher would be killed.

Billy of course didn't take the note seriously, but now he's thinking he should have because his best friend is dead, his fiance is in a coma, he has a dead guy propped up at his computer, and he got fish hooks put through his face. And the worst thing is that he can't tell the police NOW because all of the evidence makes him the prime suspect. What is Billy gonna do??? I don't know, I haven't read that far yet.