Dwell's February issue features the Parisian apartment of Mathieu Vinciguerra. It is, of course, enviably chic, and as befits an art director - which Mathieu is - effortlessly stylish. You'd never guess from the interior, but the 635-square-foot space dates from the 19th century. Mathieu worked with an architect to create a modern home that made the most of each square inch, one of the results of which is this stunning rethink on built-in bookcases. Built-ins are always useful but rarely interesting - it's a treat to see how stunning they can be when they are given a little more thought.