Freeman, James A. Parade of Days ([U.S.]: Xlibris, c2004) 278 p.
Three homeless people live in the ceiling crawlspace of the Bucks County Community College Library. They sleep during the day and come down at night to raid the staff break rooms and pick up supplies. They find books to take with them that they read and discuss.
The Librarian, Margaret Dorris, in her seventies and still full of energy, likes to embrace causes and lives in the moment. When the three hideaways are found and arrested she invites them into her home.