.book-box {
  flex-direction: row;
}

.post-preview>.post-meta>a, .post-preview>.post-meta{
    font-size:15px;
}

@media screen and (max-width: 768px) {
  .book-box {
    flex-direction: column;
    align-items: center;
  }

  .book-box table {
    width: 70%;
    line-height: 1.2;
  }

  .book-box td {
    font-size: 1rem;
    padding: 2px 4px;
  }

}