There’s a great series up on The Millions about difficult books: the kind that you kind of think you should read and would like to be able to say you enjoyed but really struggle with. There’s Ulysses, Tristram Shandy, Ada or Ardor, Moby Dick and plenty more. I’ve not got fully into it yet but seems like a great resource. Posting about it also gets Palin off the top of this site, which is a bonus.