Troilus and Criseyde - Geoffrey Chaucer

Vintage paperback 

Troilus and Criseyde is an epic poem which re-tells in Middle English the tragic story of the lovers Troilus and Criseyde set against a backdrop of war during the siege of Troy. It was probably completed during the mid-1380s. Many Chaucer scholars regard it as the poet's finest work. As a finished long poem, it is more self-contained than the better known but ultimately unfinished The Canterbury Tales. This poem is often considered the source of the phrase: "all good things must come to an end" .Wiki