Did you take a look here? -->"Sarah Kane Checklist" by Alex Sierz, New Theatre Quarterly 67 (August 2001), p.285-290.
There you gonna find some Infos, esp.: Voigts-Virchow, Eckart, "Sarah Kane, a Late Modernist: intertextuality and montage in the broken images of Crave", in: Contemporary Drama in English 8 (Trier,2001), p.205-220.
Other sources are the introduction to "the complete Plays", and "In-yer-Face-Theatre" by Aleks Sierz. The book by Graham Saunders "Love me or kill me" is still not available. MUP said it will be published by February,12, but it isn't.
Archive 19-2-2002