Thanks for sending, this looks great!
I like that they have them listed as "Volumes", though when looking at the actual number of books it's much more than 51 (122 books and 60 lectures, though Don Quixote is only part 1 lol. Can you tell my work is slow this Friday afternoon?) though the shorter books in a volume make up a normal length book so it's a wash.
Still, if a non-Harvard education has taught me anything it's to be annoyingly pedantic on an internet forum lol.