Between the book covers: US librarian reveals left-behind treasures

An assortment of ephemera are displayed in 'Found In A Library Book', a collection of letters, drawings, photos, and much more found in returned library books, at the Oakland Public Library in Oakland, California. Photo: AFP

Family photos, a Public Enemy backstage pass, a weekend to-do list ("Saturday: file taxes, Sunday: chill, watch game") and unused beer vouchers from 2002: it's amazing what people leave in library books.

For years, one US librarian has made a collection of the flotsam she found between the pages of borrowed titles.