Instructions:

There are eight books hidden in this image. They look like rectangles with scribble lines as titles. In some cases they are rotated in others they're not. Help Excel 1+2+3 gather all the books in the room!

*** You should download this in high resolution if you wanna find the books***

The way I did the background or scene or the place was by means of brushes, screentones, edited autocad blocks and edited sketch up blocks! I didn't draw all that!! The only things that are mine are the paintings on the wall and of course my hand drawn character Excel 1+2+3.