The first title in New Zealand-born author Helen Dawson’s series of detective stories for girls, featuring Noreen Gray, a young woman who has just finished school. Noreen goes to work for her Aunt Joan, a famous private detective, and is soon hot on the trail of the mysterious ‘masked three’.

London: J. M. Dent, 1957. First edition, publisher’s file copy. 151 pages. 19 x 12.5 x 2. Hardback. Spare dust jacket was taped along edge to front pastedown by publisher, now unstuck, with neat tape mark. Small split to top of spine. Very good in very good dust jacket.