Unreturned

This morning I was in a friend's house in my dream, and I noticed that all of her books were covered with plastic. I took one off a shelf, opened it, and saw that it was stamped with the name of a library. Inside the book was a letter from me with a package of seeds for spring planting. I was shocked that my friend had never returned her library book. The whole wall of her living room, in fact, was a gigantic bookcase of unreturned library books from many different libraries. All of the books had personal letters folded into them.