Read the first Harry Potter book, but didn't get into it enough to read any of the others.
I read the first Richard Osman book but didn't bother with the second, even after all the hype.
I adored A Christmas Carol, but none of Dicken's books have managed to live up to that one.
This is Going to Hurt I found both funny and sad.
And Time Traveller's Wife I didn't get beyond the first few pages, nor with Room (what 4 year old child speaks like that??).
But adored We Need to Talk About Kevin, so much so, I've read everything written by Lionel Shriver before and since.