SOLVED. Thriller - two boys - where one is psychotic and plans to derail a train. [s]

[Jaya]

This is set in a small town where two boys are good friends - but of them forces his friend to help with derailing a train to kill people (strangers) just for the fun of killing

The author's second name sounds has a double-O in it.

[Rosa]

The Voice of the Night

[Jaya]

Oh yes absolutely right. Thanks sooo much Rosa
You're awesome!!

[Rosa]

You're welcome, and thank you!