After blogging the nail-less Legend Bookshelves from Christophe Delcourt for Roche-Bobois in yesterday's 7x7 post we realized we had a nagging sense of déjà vu. So we Googled it (the tree-like shelf thing), and what we found was a full-blown design trend, tailor-made for enthusiasts of shelving...and trees. It's always interesting to see different realizations of a similar concept. Above is Matteo Casarosa's Albero della Cuccagna. And after the jump there are four more variations on the theme. Did we miss any?