Hi,
I haven't read it, sorry. It costs £85 (£70 second hand) and London libraries don't have it. I could try suggesting to the library that they order it, but I doubt they would order it given the costs and limited appeal. I suspect it will be available in University libraries, though the one I tried didn't have it.
It is for me too much for a book I have yet to find reviews on.
By coincidence I just found a launch event for the book on 25 May 2023 "join us for the launch of Leah Sidi's new book Sarah Kane's Theatre of Psychic Life: Theatre, Thought and Mental Suffering, followed by a drinks reception. This is a hybrid event, supported by the UCL Health Humanities Centre".
Book author Leah will be joined by Dr Hannah Greenstreet (University of Liverpool) and Dr James Rákóczi (Durham University) for a discussion about Kane's relationship to feminist theatre, mental health, and the medical humanities.
Details are here
https://www.eventbrite.co
.uk/e/sarah-kanes-theatre-of-psychic-life-theatre-thought-mental-suffering-tickets-624348191247