A stackable bookshelf is comprised of modular units that allow you to customize the overall size and shape of the shelf. Choosing the best stackable bookshelf starts with determining what your requirements for space and weight are; determine how many books you have to store, how large the books are, and what other items you might store on the shelf. Once you have determined your space and weight requirements, consider aesthetics, price, materials, availability of additional stackable units, and the method by which individual stackable bookshelf units are connected together. The connecting process should result in a stable, solid bookshelf that will not wobble or fall.
The materials used for construction of the stackable bookshelf will have a significant impact on both the appearance and strength of the shelf. Wood, metal, and plastic are the three most common materials used for construction of a stackable bookshelf, and each material has distinct advantages and disadvantages. Wood is perhaps the most visually appealing, though it can be heavy and expensive. Metal is often less expensive, depending on the type of metal used, and it is reasonably attractive and usually quite strong. Plastic tends to be flimsier than the other materials, and the appearance is not always appealing, but it is often the least expensive option, so it is often used for temporary storage, such as in a dorm room.
The connecting methods for the modular units will vary significantly according to the materials used and the manufacturer's preferences. Be sure to examine the connecting methods carefully to determine whether they will create a strong connection that will prevent wobbling, falling, or slipping out of place. The connecting method will have a significant impact on the overall strength of the shelf; while each shelf may be strong and well-constructed, if the connecting method is not sufficient, the unit will not be strong enough to support the weight of books and other items. Choose a good connecting system to avoid damage to the shelf, the items on the shelf, and any bystanders.
Of course, it is important to choose a stackable bookshelf that fits your preferences as far as aesthetics. These shelves come in a variety of shapes, sizes, and designs, and the ultimate decision as to which shelf is best will be left up to your preferences. Be sure to choose a shelf that will suit your needs for storage, and one that will fit the overall aesthetic of the room in which the shelf will be placed.