#menu {
margin-top:0.5px;
    background-image: url("../images/menu/fondo_menu.jpg");
	background-repeat:no-repeat;
	background-size:100% 100%;
    float: left;
    min-height: 800px;
    width: 200px;
}
.m_un {
    list-style: none outside none;
    margin-bottom: 0;
    margin-top: 10px;
    padding-left: 10px;
}
.isbn{
padding-left: 20px;
}
.aladreta {
    margin-left: 34px;
}
#ul_menu {
    float: left;
    margin-top: 20px;
}
#sup_esq {
    background-image: url("../images/finals1_01.jpg");
    float: left;
    height: 160px;
    width: 195px;
}
#sup_esq img {
    margin-left: 15px;
    margin-top: 6px;
}