Author has written 24 stories for Four Brothers, Chronicles of Narnia, Supernatural, Hellboy, Lord of the Rings, and Freaky Links.
Actually two quotes say it all:
"I have great confidence in fools. Self-confidence my friends call it."
"There is no friendship that cares about an overheard secret."
I've listed the Narnia stories as they should be read. The first ones weren't written to fit together, but they somehow do.
The Apple That Fell Through Worlds
On Foreign Ground/The City of Nowhere
The Last Guardians
Four Corners of a Map
Sequel to Last Guardians Four Corners of a Map.
On a Bed of Moss in a House of Willows
The Youngest Gift
The Granite Girl
The Other World
Blue Rain (Not connected with the storyline from The Other World, but it kinda fits)
Leaves of Green