#the_shelf.pdfflip-onshelf ppf-flip-shelf:before,
#the_shelf.pdfflip-onshelf ppf-flip-shelf:after {
    background-image: url('/themes/custom/jlr_corporate/images/pdf_library/dark_shelf.jpg');
}

.pf-popup-thumb .pf-book-title {
    font-size: 1.29em;
    left: 12px;
}