I.A. Richards 
Principles of Literary Criticism [PDF ebook] 

Ivor Armstrong Richards was one of the founders of modern literary criticism. He enthused a generation of writers and readers and was an influential supporter of the young T.S. Eliot. Principles of Literary Criticism was the text that first established his reputation and pioneered the movement that became known as the ‘New Criticism’. Highly controversial when first published, Principles of Literary Criticism remains a work which no one with a serious interest in literature can afford to ignore.