I've noticed that the top reason why I find many books unreadable is the writing style.
Here's an example I saw today whilst browsing the library shelves -
''Jane Haughton sat in an oak chair, smoking a cigarette. She looked out of the window, and was feeling sad. Then Mr Jacobs came in. He was a short man with a thick moustache and he had a bad expression on his face, but as he liked Jane that expression softened as he saw her''.
Most books have a bit of this, but when it's pages & pages of a writing style that feels more suitable for early - mid teens, it's a turn-off, and I see it a lot in books that are apparently written for adults. I can tolerate it if the book is very entertaining and fun, just about, but that's very rare and most of the time I'll just abandon the book.
I like historical and fantasy genres in particular, so does anyone have recommendations of authors who write in a more subtle / sophisticated manner (no present tense please) ?