The Sinclair's Mysteries is a quartet of children's historical mysteries from author Katherine Woodfine. Each of the novels is set in Edwardian London and revolves around the fictional department store, Sinclair's. Sinclair's is an establishment very much like Selfridge's, catering to London's rich, offering high fashion, perfumes and sweets. The series heroines Lilian Rose and Sophie Taylor are employed on the shop floor and frequently find themselves privy to criminal goings-on.