Anglo-Saxon Poetry: Essays in Appreciation. Lewis E. Nicholson and Dolores Warwick Frese, Editors.Notre Dame, 1975.
H. S. Bennett, Chaucer and the Fifteenth Century. Oxford, 1961.
The Cambridge Companion to Old English Literature. Edited by Malcolm Godden and Michael Lapidge. Cambridge, 1991. Essays on a variety of general topics related to Old English literature.
E. K. Chambers, English Literature at the Close of the Middle Ages. Oxford, 1961.

On Line

On-Line Reference Book for Medieval Studies Extensive Collection of Resources.
Anglo-Saxon and Medieval from Voice of the Shuttle.
Medieval Resources from Luminarium.
Medieval Literature from Questia. Commercial but extensive.
Medieval Romance Sources Also from Questia.