The Pooh Code II is about a Grail Hunter named Bob looking for the Holy Grail in North America. He finds it but someone gets to the Grail first and kidnaps her.
Bob thinks the clues to find her are in an oil painting of Pooh by Pooh illustrator, E.H. Shepard. That’s because the girl’s name is Robin like Christopher Robin and she lives in Winnipeg which is where the name Winnie came from.