Image Title: Ikea Hacks The Best 23 Billy Bookcase Built Ins Ever Horizontal With Doors Plan 12. Filename: ikea-hacks-the-best-23-billy-bookcase-built-ins-ever-horizontal-with-doors-plan-12.jpg. Image Dimension: 960 x 640 pixels. Images Format: jpg/jpeg. Publisher/Author: Julio Goyette. Uploaded Date: Wednesday - May 02nd. 2018 10:07:26 AM. Category: Architecture. Image Source: digsdigs.com.