To call Ikea a ‘retailer’ just doesn’t do it justice. Far more than a store, it has become an emporium of ideas and possibilities. Democratic by design, the low prices and (mostly) well thought out designs have meant that Ikea's wares have become a springboard for makers and DIY-ers alike, personalising and customising basic pieces so that they become something else entirely. And the highest selling and arguably most hackable design of them all is the Billy bookcase – one is sold somewhere in the world every ten seconds. Infinitely versatile, there are thousands of ways to make yours stand apart. Click through for six of our favourites, from styling suggestions to full on hacking.