Yes, he might. If Dr John is into Japanese pop culture or is a fan of modern literature, there's a good chance he has a light novel. Light novels are quite popular these days.
The Long John Silver story is centered around the adventures in 'Treasure Island'. Long John Silver is a very memorable character. He has a parrot on his shoulder and uses his wits and charm to manipulate those around him. He leads a group of pirates in their search for the hidden treasure, and his actions drive much of the plot's conflict and excitement.
Typically, John Silver's horror novels are known for their dark and gloomy atmospheres. They often feature spooky settings such as old mansions or abandoned asylums.