Kotaku.com shows us books stacked up in a variety of different formations.
Traditionally, books in Japanese bookstores are stacked in small piles or placed on shelves—like anywhere else. The book tower trend isn't exactly new and puts a flourish on retail presentation, whether it's the straight up "tower pile" or the "spiral pile" variation.
Back in 2009 to mark the launch day of Haruki Murakami's new book 1Q84, Tokyo book retailer Sanseido changed its shop sign to "Books Murakami Haruki" and unveiled a book tower that was then copied by other stores. Now, it seems there are even manga towers and spirals—but don't think every bookstore does this.