body {
    font-family: Arial, sans-serif;
}

.book-cover {
    max-width: 250px;
    /* Set a hard width */
    height: auto;
    margin: 20px auto;
    display: block;
    border-radius: 8px;
    /* optional: softer corners */
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    /* optional: a nice shadow */
}