alish2o was the collection point for all the physical (paper) books. Only the pdfs that were for all (or donators who donated over a certain amount) have been sent out. Alish2o has a list of pdfs that publishers offered as specific prizes.
So what needs to be done is:
get a list of what product there is up for grabs.
if there is more/less than the number of contributors randomly assign 1 product to people.
if there is more, then once everyone as at least 1 product, keep going through until everything is assigned.
email every person to see if there email address stills works and if they still live at the same address. Note a mail merge email document might be a quick easy way to do this.
the emails that come back not known, do a shout-out and find out what their new emails are. If they dont get back to you within a fixed period of time, then drop them from the list.
I think that's a start for what needs to be done. Note there were a couple of people offering to help with determing randomly who gets what once complete lists of emails and products were determined.