Stitch those PDFs together while you grab coffee! Run this in the directory where you just wgot the pdfs:

    files=`ls | grep toc && ls | grep pref && ls | grep ack && ls | grep c && ls | grep bib && echo ls | grep index`; gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=SecurityEngineering2ndEd.pdf $files

When you get back, you should have a single file, SecurityEngineering2ndEd.pdf (edit the command to name yours whatever you like)

Edit: This assumes you're running a unix variant and have ghostscript (gs) installed

Edit: Use this instead in case toomuchtodo's dropbox link doesn't work for you (like what happened for me: "This account's public links are generating too much traffic and have been temporarily disabled!")