The Tales from the Haunted Mansion books are aimed a kids, but grownups enjoy them too (I know I do) and the second one in the series was just released in July.
This one follows a new character, William, who is looking to have a seance with Madame Leota.
I liked the first book and plan on getting this one too. You can pick it up on Amazon in either Kindle Edition or Hardcover Edition.