So perhaps this will spark some one's memory and can provide a book title. When I was younger, in middle school or so, I read a book that was way over my head and I wanted to reread it. Problem is, I can't remember the name of the dern book. All I know is it centered around someone (maybe even a small group of people) that traveled through the different dimensions. I know it's a long shot, but if it rings a bell, let me know please!