I'll abandon books. If someone has sent them to me to read, because they really really LOVED them, I'll keep them and give them another go. Later. Sometimes much
But if it's a library book, highly recommended and so put on hold and received, and I simply don't get into it when reading it, back it goes to the library. There are too many good or great books out there for me to be reading something that I do not enjoy.
That said, I've picked up a book which I had tried a year or two previously, and didn't like, and on the re-read I absolutely loved it. That happened with me, with The Hobbit
. Everyone was oh wow this is such a great book
and I read some of it and ... eehhh. Then, a couple years later, I tried it again. OH WOW THIS IS SUCH A GREAT BOOK!
and SO ARE THE LORD OF THE RINGS books!
and I was caught.