.book-display {
    display: flex;
    flex-wrap: wrap;
}

.book-item {
    width: 25%;
	text-align: left;
	padding: 1.25rem 1.5625rem;
}

.book-item h3 {
    font-size: 18px;
    margin-bottom: 5px;
}

.book-content {
    font-size: 16px;
    line-height: 1.5;
}

.book-display .book-item .editor-name, .book-display .book-item .author-name  {
   display: inline;
}
.book-display .book-item .editor-name::after, .book-display .book-item .author-name::after {
   content: ',';
}
.book-display .book-item .editor-name:last-of-type::after, .book-display .book-item .author-name:last-of-type::after  {
   content: '';
}

@media only screen and (max-width: 1000px) {
  .book-display .book-item {
    width: 33.3%;
     padding: 1.25rem 1rem;
  }
}
@media only screen and (max-width: 600px) {
  .book-display .book-item {
    width: 50%;
    padding: 1.25rem .5rem;
  }
}