Bookends should be sturdy and of a size appropriate to the items they suppo rt. When shelving books at the end of a row, care must be taken not to wedge the edge of the bookend between pages of the book. Move the bookend aside to insert the book, and then carefully replace it for firm support. The books are straight and well-supported, but there is plenty of room at the end of the shelf. The large book is shelved spine-down.
Larger items require horizontal shelving.
If oversized items are shelved vertically, their weight gradually causes their covers to warp, unless they are shelved very tightly together. However, such tight shelving presents problems, such as strain and fr iction, in the removal of materials from the shelves. Horizontally shelved items should not be stacked more than two or three items high. They preferably should be shelved singly, depending on factors such as weight, size, and condition of the binding.