What sort of info or look are you trying to convey? I'm not sure about the coding but some authors are including additional text and graphics in the image they use in their cover page. However this doesn't always work at small display widths and sizes. Here's an example that works nicely because it is centered at the bottom of the image, and so doesn't get cropped and doesn't conflict with the title and subtitle of the Cascade: see the logo and agency name at the bottom of the cover page in this Cascade by the USDA Natural Resources Conservation Service http://nrcs.maps.arcgis.com/apps/Cascade/index.html?appid=4cedd69fafe646a3b94697072ec6fdd7
