Of books I've completed, Thomas Hardy's The Mayor of Casterbridge. Read it at school, hated it (as well as Far from the Madding Crowd and Tess of the D'Urbervilles) - full of ridiculous coincidences. And also utterly miserable to boot.
I started reading The Da Vinci Code, but gave up after the very first page.
I... actually liked the Da Vinci Code ๐ถโ๐ซ๏ธ.
I think I even read the sequel/ the author's next book.
I mean, I was a teenager at the time it came out, looking for some light holiday reading... I think my mum had read it and thought I would enjoy it...