inside of the cardboard part and glue one of the inside cover papers onto the cardboard and the glue flap from the page bundle. take one of the plastic sheets and put it on top of the paper, this will prevent the pages from sticking to the cover until the glue is dry.
now flip to the other side of the cover, the whole thing already looks a lot like a book now. cut the last page to a flap as well and do the same as with the front cover. put another sheet of plastic between the last page and the cover.
put your book back between the boards and press 