Changeling / Matt Wesolowski.

"On Christmas Eve in 1988, seven-year-old Alfie Marsden vanished in the Wentshire Forest Pass, when a burst tyre forced his father, Sorrel, to stop the car. Leaving the car to summon the emergency services, Sorrel returned to find his son gone. No trace of the child, nor his remains, have ever been found. Alfie Marsden was declared officially dead in 1995. Elusive online journalist, Scott King, whose `Six Stories' podcasts have become an internet sensation, investigates the disappearance, interviewing six witnesses, including Sorrel, his son and his ex-partner, to try to find out what really happened that fateful night. He takes a journey through the trees of the Wentshire Forest - a place synonymous with strange sightings, and tales of hidden folk who dwell there. He talks to a company that tried and failed to build a development in the forest, and a psychic who claims to know where Alfie is... Intensely dark, deeply chilling and searingly thought provoking, Changeling is an up-to-the-minute, startling thriller, taking you to places you will never, ever forget."--Publisher's description.

Crime.