Hold on Tight bookshelf by ColleenAndEric.com - Even in the digital age, we all still have personal libraries of books we just can't let go of. Use the Hold on Tight bookshelf to keep your most treasured books upright, on display, and close at hand. A brightly-coloured aluminum cube and oversized wing nut serve as a sliding bookend which can be adjusted and secured wherever it is needed, whether your book collection is growing or shrinking. Offered in Beech, Walnut and Oak. (41"L x 11"H x 8"D).
Info from the source: "The shelves were from Home Depot~you can find them in the closet organization section. I liked them because they were a bit deeper than others I looked at, but not so deep that they stick too far out from the back of the toilet. $27 x 3 =$81"