well, I could say the same for myself, but I just can't live in 2 books at the same moment. I live in a book until I start reading another. Most of the time I return to living in LOTR, though, no matter how many different books I read.
I literally leave this world when I read. You won't be able to get my attention unless you shout in my ear.
At least now I know I'm not the only one who lives in books, twin sister
!