function logPageCount() {
    Log.data("total-page-count", Prince.pageCount);
}

Prince.trackBoxes = true;
Prince.addEventListener("complete", logPageCount, false);

Prince.addEventListener("complete", checkPages, false);       
        function checkPages() {
            var ps = document.querySelectorAll(".front-matter, .continuous, .reset-counter, .book-back");

            for (var i = 0; i < ps.length; ++i) {
                var p = ps[i];
                var bs = p.getPrinceBoxes();

                if (bs.length > 0) {
                    var firstbox = bs[0];
                    var lastbox = bs[bs.length - 1];
                    Log.warning('page-range, shortcode:' + p.id+ ', code:' + p.getAttribute('jbid') +", section:" + p.className + ", start-page:" + firstbox.pageNum + ", end-page:" + lastbox.pageNum);
                }
            }
        }