The Left-Handed Booksellers of London by Garth Nix - eBook - Fiction Books - Historical, Historical Fiction, Magic

Merlin is a young left-handed bookseller (one of the fighting ones), who with the right-handed booksellers (the intellectual ones) are an extended family of magical beings who police the mythic and legendary Old World when it intrudes on the modern world, in addition to running several bookshops Susan’s search for her father begins with her. Mother’s possibly misremembered or misspelt surnames, a reading room ticket, and a silver cigarette case engraved with something that might be a coat of arms.