Heathman Hotel Library

The Heathman Hotel in Portland, Oregon, has a collection of 4000 books, each signed by their author.

The hotel began collecting books in the mid-1980s, Erickson said, and the library opened in 1992.

"We found that many authors who came to Portland for readings and literary events stayed at the Heathman," he said. "We began having them sign a book to mark the occasion."

Five authors a week stay at the Heathman on average, Soprani said, so the collection continues to grow.

The majority of the collection is available to guests to take to their rooms to read.