Just joined a heap of PDF files with pdftk output*.pdf cat output nov2010.pdf and got a 19.5MB PDF file. From here found a working solution to reduce the size of the PDF. gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH...