.book_rel {
  position: relative;
  display:block;
  width: 100%;
  height: 100%;
}

.book_abs {
  top:50px;
  left:0px;
  display:block;
  position:absolute;
  z-index:100;
  text-align: center;
  margin: 0 auto;
  margin-top: -50px;
  width:200px;
  height: 50px;
  padding:0px;
  line-height: 50px;
  font-size: 11px !important;
  font-family: Arial;
}

.book_abs a {
  color: #fff;
  text-decoration: none;
}

.book_abs a:hover {
  color: #f00;
  text-decoration: none;
}

.book_pdf {
  top:50px;
  right:0px;
  display:block;
  position:absolute;
  z-index:100;
  text-align: center;
  margin: 0 auto;
  margin-top: -50px;
  width:200px;
  height: 50px;
  padding:0px;
  line-height: 50px;
  font-size: 11px !important;
  font-family: Arial;
}

.book_pdf a {
  color: #fff;
  text-decoration: none;
}

.book_pdf a:hover {
  color: #f00;
  text-decoration: none;
}