1. Aird, Eileen. 1988. ‘“Poem for a Birthday” to Three Women: Development in the Poetry of Sylvia Plath’. In Sylvia Plath: The Critical Heritage, ed. Linda W. Wagner, 191–203. London: Routledge.
2. Brain, Tracy. 2001. The Other Sylvia Plath. Harlow: Longman.
3. Brain, Tracy. 2007. ‘Unstable Manuscripts: The Indeterminacy of the Plath Canon’. In The Unraveling Archive: Essays on Sylvia Plath, ed. Anita Helle, 17–38. Ann Arbor: University of Michigan Press.
4. Britzolakis, Christina. 1999. Sylvia Plath and the Theatre of Mourning. Oxford: Oxford University Press.
5. Butscher, Edward. 2003. Sylvia Plath: Method and Madness. Tucson: Schaffner Press.