A shelf that does the job

The Billy Bookcase is a staple IKEA item, and that's for a good reason. It's simple, and does the job. They come in a natural wood colour, white, and I believe black. The one I have isn't the strongest and I wouldn't recommend storing very heavy textbooks on it, but its good for holding novels and simple decor items. The really good thing about them is that you're not restricted to using it as just a single bookcase. I've seen people create built in shelves, turn them into tables, turn them into the base of an island. The possibilities are endless.

Hold Lots of Different Size Books.

Great size book case with great colours. Has adjustable shelves. Easy to assemble and easy instructions are included. The book case is pretty sturdy. The price is decent for the quality. Though the back is not wood or very thick.