Shakespeare's First Folio -- 35 plays in a single file

According to Wikipedia: "The First Folio is the term applied by modern scholars to the first published collection of William Shakespeare's plays; its actual title is Mr. William Shakespeares Comedies, Histories, & Tragedies. ... "Printed in folio format ..., it was prepared by Shakespeare's colleagues John Heminges and Henry Condell in 1623, about seven years after Shakespeare's death. Although eighteen of Shakespeare's plays had been published in quarto prior to 1623, the First Folio is the only reliable text for about twenty of the plays, and a valuable source text even for many of those previously published.”