Now we know what librarians do during those quiet hours at work when customers are not asking them for help. Some librarians are honing their photography skills by taking photographs where colleagues pose with book covers. The results are funny and innovative.

Photos by beecavelibrary, carmel_library and saraharmageddon.

Discover more #bookface photos on Instagram. The New York Times reported about the phenomenon.

Photo by celinie.

Photo by anne_arnestad.

Photo by malvikbibliotek.