its not the question of "is it possible?", its just that these are always listed amongst the 'top 100 books of all time' and each needs more than just 'reading time' you cannot read Ulysses and 1984 the same month, physically you can, but that would be useless.
Why? One of the years I bothered keeping track[1], I read a hair over 50 novels (I think the actual number was 51 or 52), and a handful of non-fiction books I didn't bother counting. And one of those was Moby Dick which isn't exactly a fast read.
For somebody who likes to read and has time to read, that list doesn't seem outlandish to me at all. shrug