2003: Combining PDFs — Torquil Macdonald on the debian-user mailing list says that
http://www.pdfeverywhere.com/pdfsplit.tar.gz can be used to merge
several PDFs into one big one.
sachac Thanks for reminding me about that! I came across it in someone else's comment too: http://sachachua.com/blog/2013/08/write-about-what-you-dont-know-5-tips-to-help-you-do-research-for-your-blog/ - good resource. – Thinking about how to get better at asking questions