Coincidentally this article lists Malcolm Lowry's "Under the Volcano" which I posted about only half an hour ago....
https://www.theguardian.com/books/booksblog/2011/jan/04/best-boring-books
"Under the Volcano" by Malcolm Lowry.
I've started and given up on this book about five times now, not because I didn't enjoy it but because my head wasn't in the right place to be able to commit to it.
Each time I start from the beginning again. I must give it another go cos the last time...