Everyone agrees that it was the strangest wedding they had ever seen.
Everyone still alive who had ever been a regular at Hearts & Halos Bookshop received an invitation, even though it was far from obvious how the proprietors of Hearts & Halos knew where any of their old regulars lived. The proprietors looked identical to the proprietors of seventy years ago, even though they must be... grandchildren or something.
Neither the bride nor the groom appeared to have any family, possibly because they were spies, or maybe eccentric vampires. Several of the grad students were growing more enamored of the "eccentric vampire" hypothesis.
The bookshelves were covered with handmade decorations. The tables were spread with an excessive number of cakes: half homemade and as delicious as if the baker had spent six thousand years perfecting her recipe, half purchased from a baker and far less delicious but making up for it in being shaped like Daleks, Wall-E, Legos, or something called a "Lensman." The bride and groom exchanged their aggressively secular vows in front of a justice of the peace; instead of "till death do us part," they said "until the end of the world" which (it was generally felt) did not make it less likely that they were some sort of particularly eccentric and book-obsessed vampires. They hugged instead of kissing.
After the vows, there was dancing: a medley of the greatest hits of the past five centuries. Fortunately, some of the grad students did social dancing and happily waltzed and did the gavotte.