Klein published only three papers on technique, ‘Symposium on child analysis’ in 1927, ‘The origins of transference’ in 1952 and ‘The psycho-analytic play technique’ in 1955, but she left a set of unpublished lectures on technique and over 1500 pages of notes especially devoted to technical problems. She intended to write a book on technique, but did not do so. She was also going to write books on schizoid mechanisms, loneliness and mental development – too many topics, perhaps, for her to focus on any single one of them.