Look closely and you will see this is not possible.
It's a bookshelf based on the impossible fork or blivet optical illusion. (See more about the illusion at this Deceptology post: An ancient Roman optical illusion from the 1960s>>)
Does this closer view help? If not, watch the video below.
The Bias of Thoughts bookshelf
Designed by Clarke Hopkins Clarke Architects in Melbourne, Australia>>
Found thanks to Book of Joe>>