The play of mirror images in this new work of Thea Astley is quite dazzling. She goes from strength to strength in her command of the crafts of narrative. The book is an enquiry into escape, not just any escape, but escape in an almost metaphysical dimension, in which losing oneself is the only way to find oneself. The novel appears to divide into two novellas, linked by the appearance of the villain, and I use the term advisedly, in both. However the two stories are so closely linked in theme, in motifs and in structure, that they are more like twin pictures that form a diptych.