Book excerpt: In Principles of Style, Sarah Andrews presents her unique take on teaching design, drawing on her experience of working in the industry and as a teacher in her school, which has reached cult status around the world. Importantly, Principles of Style aims to be a timeless learning tool for readers, no matter their own personal style, with Sarah revealing many of the ideas, tips and skills she has accumulated along the way. She does this by examining some of her key projects and favourite rooms, as well as by focusing on her ten rules of styling, formulated both through hands-on experience and studies in the science of design. Sarah believes that everyone has the ability to create interiors that are right for them; in this inspiring and eminently practical book, she aims to demonstrate just how to do so.