The Weird Sisters, from William Shakespeare's play "Macbeth," are arguably the most famous trio of witches in English literature. Shakespeare's Weird Sisters are a complex trinitarian mythological construction - a unique amalgamation of classical, folkloric, and socio-political elements. This book is an archetypal exploration of the Weird Sisters; by examining this feminine trio through the lens of mythology, new insights about their significance may be understood. The ramifications extend from classical comprehension to twenty-first century pop culture observations related to female trios.