Mr. William Shakespeare's Comedies, Histories, & Tragedies is a collection of plays by William Shakespeare, commonly referred to by modern scholars as the First Folio, published in 1623, about seven years after Shakespeare's death. It is considered one of the most influential books ever published.

William Shakespeare was an English playwright, poet, and actor. He is widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's national poet and the "Bard of Avon". His extant works, including collaborations, consist of some 39 plays, 154 sonnets, three long narrative poems, and a few other verses, some of uncertain authorship. His plays have been translated into every major living language and are performed more often than those of any other playwright. Shakespeare remains arguably the most influential writer in the English language, and his works continue to be studied and reinterpreted.