.books {
    padding: 30px 0;
    text-align: center;
  }
  .books img {
    display: inline-block;
    position: relative;
    z-index: 1;
    width: 200px;
    margin: 0 10px;
    -moz-transform: perspective(500px) rotateY(22deg);
    -ms-transform: perspective(500px) rotateY(22deg);
    -webkit-transform: perspective(500px) rotateY(22deg);
    transform: perspective(500px) rotateY(22deg);
    -moz-transition: all 0.2s ease;
    -o-transition: all 0.2s ease;
    -webkit-transition: all 0.2s ease;
    transition: all 0.2s ease;
    box-shadow: -2px 0 -1px black, -4px 0 -2px black, -6px 0 -3px black, -8px 0 -4px black, -10px 0 -5px black;
  }
  .books img:hover {
    -moz-transform: perspective(500px) rotateY(0deg);
    -ms-transform: perspective(500px) rotateY(0deg);
    -webkit-transform: perspective(500px) rotateY(0deg);
    transform: perspective(500px) rotateY(0deg);
    box-shadow: none;
  }

  
  body {
    background: url(http://subtlepatterns.subtlepatterns.netdna-cdn.com/patterns/retina_wood_@2X.png);
    background-size: 512px;
    overflow: hidden;
  }