.bookshelf .thumb {
    display: inline-block;
    cursor: pointer;
    margin: 0px 0.5%;
    width: 15% !important;
    box-shadow: 0px 1px 3px rgba(0,0,0,.3);
    max-width: 100px;
}

    .bookshelf .thumb img {
        width: 100%;
        display: block;
        vertical-align: top;
    }

.bookshelf .shelf-img {
    z-index: 0;
    height: auto;
    max-width: 100%;
    vertical-align: top;
    margin-top: -12px;
}

.bookshelf .covers {
    width: 100%;
    height: auto;
    z-index: 99;
    position: relative;
    text-align: center;
}

.bookshelf {
    text-align: center;
    padding: 0px;
}