Hi!! It has taken me long enough to put this video together so without further adieu, here's how I created these viral arched builtin bookshelves using Ikea billy bookshelves and the billy extension units. Let me know in the comments if you have any questions. Inspiration - https://littlegreennotebook.blogspot.com/2013/01/making-billy-bookshelves-look-like_7.html?m=1