Runners and Riders (Crooke and Loch, #2)

Samantha's school bestie has vanished. Mick has some time and goes in search

It was deliberate.
The car had slammed sideways into my motorbike on a perfectly straight, almost deserted, bit of motorway, on a clear dry summer's evening. After the brief impact, it had eased back into the outside lane and sped away.
I had been happily riding along on a warm evening. Then, in an instant, I am sliding along the tarmac at some sixty miles an hour. I can hear my bike tumbling somewhere ahead of me on ...