.titleAuthor {
    font-weight: bold;
    clear: right;
    }
  img {
    width:150px;
    max-width:50%;
    float:right;
    margin-left: 0.3em;
  }

  .book, .backLink {
    clear:right;
  }

  .backLink {
    text-align: right;
    padding-top:1em;
  }

  .titleAuthor:hover {
    background-color: #235EA4;
    color:white;
    content: '#';
    cursor: pointer;
  }
  
  .titleAuthor::after {
    content: ' #';
    color: white;
  }