Who is the author of ‘The Shepherds Calendar’?

Edmund Spenser is known as the 'Poet of Poets' in English literature. His famous Epic is The Faerie Queene.
His famous books - The Shepherds Calendar, The Ruins of Time, Amoretti (Collection of 89 Sonnets).
Source: An ABC of English Literature, Dr. M Mofizar Rahman and ওয়েবসাইট Lecture