Which work is NOT written by Sir Philip Sidney?

The work that is not written by Sir Philip Sidney is "Doctor Faustus." This play, written by Christopher Marlowe, is a classic example of Elizabethan drama that explores themes of ambition, knowledge, and the human condition through the story of a man who makes a pact with the devil.

In contrast, the other works listed are all attributed to Sir Philip Sidney. "Astrophil and Stella" is a sequence of sonnets dedicated to his beloved Stella, reflecting the complexities of love and desire. "Arcadia" is a pastoral romance that combines prose and poetry, showcasing Sidney's literary talents. "The Defense of Poesy," also known as "An Apology for Poetry," is a critical work that argues for the value of poetry and its moral purpose. Each of these works contributes significantly to the English literary tradition, reinforcing Sidney's reputation as a key figure in the development of poetry and criticism in the Renaissance period.