Walmart offers the Mainstays 3-Shelf Bookcase in several colors (Espresso pictured) for $14.47. Opt for in-store pickup to avoid the $5.99 shipping charge. That's $4 off and the lowest price we've seen. It measures about 30" x 12" x 32" and features two adjustable shelves.
Reviewing this critical insurance policy takes a little effort, but it pays off big.