Abstract: A guide apparatus for applying a cover to a bound stack of sheets, including a base unit which defines a book receiving surface and a first alignment member having a lower cover stop disposed along a reference line, and a first upper cover stop also disposed along the first reference line. A first book stop is included defining a stack engaging surface which is positioned intermediate the cover engaging surfaces of the first upper and lower cover stops and with said stack engaging surface extending a distance past said first reference line towards the book receiving surface. The first upper and lower cover stops are positioned to engage top and bottom cover sections of the cover, with the stack engaging surface being positioned to contact the edge of the stack so as to precisely align the stack with respect to the top and bottom cover sections in one direction.