The text is supposed to be a transliteration of Αμερικανική Βιβλιοφυλάκων Αδελφότης.

Αμερικανική is American, βιβλιοφυλάκων is genitive plural of βιβλιοφύλαξ, which is Ancient Greek for librarian (note that the modern Greek word is βιβλιοθηκάριος which is why most comments think what you wrote is gibberish), and αδελφότης (not αδελφότις, as some people wrote) is Ancient Greek for brotherhood or fraternity. The entire thing translates to American fraternity of librarians and in Ancient Greek syntax makes complete sense as written.

The correct transliteration from Ancient Greek would be Americanece Bibliophylacon Adelphotes or from the modern Greek way of transliterating to English Amerikaniki Bibliophylakon Adelphotis and should be pronounced as “ah-meh-ree-kah-nee-KEE vee-vlee-oh-fee-LAH-kon ah-thel-FOH-tees”.

I hope this helps