Using the sample code for "Creating a map book with facing pages" , the resulting PDF output is very pixelated. No, I am not using any raster data in the source MXD, nor do any of the vector layers have transparency. I do have vector contour lines in the source MXD. I think because of the presence of the contours, arcpy is defaulting everything to 72 dpi. However, def PDFDocumentCreate does not seem to have any parameters that can control the output pdf quality. Is there a way that mass-production map books can be output to high-quality PDF's?