h1.title{
  /* width: 690px; */
  width: 860px;
  background-color: green;
  color: white;
  margin: 0 auto;
  padding: 10px;
  text-align: center;
}
h2.author{
  text-align: center;
}
p.image{
  text-align: center;
}
p.image img{
  /* width: 690px; */
  width: 860px;
} 
a:link{
  color: green;
}
a:visited{
  color: gray;
}
a:hover{
  color: skyblue;
}
a:active{
  color: red;
}
.content{
  margin: 0 auto;
  width: 860px;
}
p.copyright{
  text-align: center;
}
span.cast{
  font-weight: 700;
}
.main{
  color: brown;
}
.sub{
  color: orange;
}
hr{
  border: 0;
  height: 0;
  margin: 0;
  padding: 0;
}
hr.separator{
  border-top: 3px dotted navy;
}
ul.books{
  display: flex;
  list-style: none;
  padding-left: 0;
}
li.book{
  background-color: lightgray;
  padding: 10px;
  margin-right: 10px;
}