56 - but there are some on that list which I suspect life is too short to bother with (and I read endlessly). I started Midnight's Children, and gave up. I persisted with Brideshead Revisited, but it was dreary. However, I've read every single bit of prose Thomas Hardy ever wrote, some several times over - so who am I to say?
One serious omission is The Line Of Beauty (one of the greatest novels ever). Music and Silence and Birdsong are also big omissions which will stand the test of time, IME. I think there should probably be something by Kate Atkinson (Life After Life?) My tastes are generally 19thC ish, but those are all novels I wish I had written.
I also wonder where Trollope is, along with the Forsyte Saga. The Cazalet Chronicles might also just squeeze in there.
But others might hate all of the above!