A bundle of identical book blocks composed of a plurality of folded print sheets or signatures standing upright on lower edges of the printed sheets or book blocks. The book blocks are formed with first and last book block sections having different dimensions. A quadrangular bundle is formed from the book blocks by aligning first limit surfaces of the book block sections flush with each other along one of the two side surfaces or along the upper or lower surfaces of the bundle so that a second limit surface of the first book block section opposite the first limit surface of the first book block section projects with an offset with respect to a limit surface of the last book block section opposite the first limit surface of the last book block section. The bundle is compressed and then secured.