.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.65)), url('../images/hero-bg.jpg') no-repeat center/cover;
}
body {
    background: linear-gradient(0deg,rgb(109, 109, 109) 0%, rgb(236, 236, 236) 100%) repeat center fixed;
}
#bookshelf {
    background-color: rgb(221, 221, 221);
}