Free short story by Ramsey Campbell - The Long Way
Also free in Mobi and EPUB formats as a zipped file from the publisher's website:
This horror novelette was originally published in 2008 as a PS Holiday Hardcover Chapbook for subscribers to the award winning to Postscripts magazine.
The only description I could find was from someone's blog, so I'll just quote a little here:
THE LONG WAY is about a boy who walks to his wheelchair-bound uncles’ retirement village every Saturday to help him buy groceries. His route takes him past a section of housing that has been vacated due to its proximity to a wooded area frequented by criminals. Through the doorway of one of those abandoned houses, the boy notices an obscured figure that seems to be leaning forward on sticks. There’s something unnatural about the way it keeps moving incrementally closer to the open portal each time he passes.
Like with everything Campbell writes, the atmosphere is charged with potential menace...