There is a lot of material available on Wyatt which usefully explores the social and political context of his writings. Also, there are helpful explorations on the structural significance of Wyatt's development of the sonnet form.
Here are the most useful references I tracked down when researching Wyatt.
Harrier, Richard. The Canon of Sir Thomas Wyatt's Poetry. Harvard:HarvardUniversity Press, 1975.
Muir, Kenneth, ed. Sir Thomas Wyatt and His Circle - Unpublished Poems. Liverpool:LiverpoolUniversity Press, 1961.
Rebholz, R.A., ed. Sir Thomas Wyatt - The Complete Poems. Middlesex: Penguin Books Ltd, 1978.
Tillyard, E.M.W. The Poetry of Sir Thomas Wyatt - A Selection and a Study.London: Chatto & Windus, 1949.
Dasenbrock, Reed Way. "Wyatt's Transformation of Petrarch." Comparative Literature Vol 40, No. 2 Spring 1988
Friedman, Donald M. "The Mind in the Poem: Wyatt's They Fle From Me." Studies in English Literature 1500-1900 Vol 7, No.1 The English Renaissance Winter 1967
Glaser, Joe. "Wyatt, Petrarch and the Uses of Mistranslation." College Literature Vol 11, No. 3, Fall 1984
Kay, Dennis. "Wyatt and Chaucer: They Fle From Me Revisited." Huntington Library Quarterly Vol 47, No. 3 Summer 1984
Smith, Hallett. "The Art of Sir Thomas Wyatt." The Huntington Library Quarterly No. 4 August 1946
Warnicke, Retha M. "The Eternal Triangle and Court Politics: Henry VIII, Anne Boleyn and Sir Thomas Wyatt." Albion: A Quarterly Concerned with British Studies Vol 18, No. 4 Winter 1986
A newer text, which I have not yet read, "Thomas Wyatt - The Heart's Forest" by Susan Brigdean is reviewed in the January edition ofTimes Literary Supplement. I have supplied a link to the review below.