Major Works
Confessions of an English Opium-Eater and Other Writings, edited by Grevel Lindop, is available in Oxford World's Classics. It includes the celebrated " On the Knocking on the Gate in Macbeth."

Confessions of an English Opium-Eater ( 1821 ).
Letters to a Young Man ( 1823 ).
Three Templars ( 1824 ).
Walladmor ( 1826 ).
Laocoön ( 1826 ).
Murder as One of the Fine Arts ( 1827 ). Klosterheim ( 1832 ). Reprint from Woodbridge Press, 1982.
Logic of Political Economy ( 1844 ).
Selections Grave and Gay ( 1853-60 ). Includes much work previously published in periodicals like Tait's Magazine. Among other works are his Recollections of the English Lake Poets and his Autobiographic Sketches.
About De Quincey
Horace Ainsworth Eaton, Thomas De Quincey: A Biography. Oxford, 1936.