This Norton Critical Edition is based on the Folio edition of ''King Lear''. The editor has interpolated the best-known and most-often discussed passages from Quarto I as is fully explained in ''A Note on the Text'' and the annotations. ''Sources'' helps readers navigate ''King Lear's'' rich history and includes the nine essential primary sources from which Shakespeare borrowed significantly in creating his play, along with two additional likely sources. Thirteen critical interpretations, and three adaptations and responses are provided. A bibliography is included.