He wrote "Lyrical Ballads" with Wordsworth, & his "Biographia Literaria" is the best of English Romantic criticism
In 
1906, the poet Arthur Symons called the work 'the greatest book of criticism in 
English, ... publication Lyrical Ballads and then in the preface to Wordsworth's 
Collected ... that although his characters were 'supernatural, or at least romantic', 
he tried... [DOC] [TLE] British Literature Wiki - Preface to Lyrical Ballads [PAR] Biographia Literaria-chapter XIV ... After the Lyrical Ballads was written, 
Coleridge wanted to write a Preface so that he could clarify his poetic style and 
eliminate many criticisms that were coming to ...