The Ruby in the Smoke (1985) is a novel by the English author Philip Pullman. It went on to win the 1987 Lancashire Children's Book of the Year Award. It was also adapted for television in 2006. This book is the first of the Sally Lockhart Quartet. It is followed by The Shadow in the North, The Tiger in the Well and The Tin Princess. The book was also adapted for the stage at the Edinburgh Festival Fringe in August 2016.

Veronica Beatrice "Sally" Lockhart is a fictional character in a series of books by Philip Pullman.