For the PLMCN24's abstract book, I patched stampit to read information from a file as opposed to from the filename. First, in the folder of abstracts, I join all of them:
pdftk *.pdf cat output all-abstracts.pdf
I then append the Introductory material (from the core plmcn folder):
pdftk program-booklet/booklet.pdf abstracts/all-abstracts.pdf cat output full-book.pdf
which I burst into single pages again: