Is there any books that you DNF (did not finish)? What was the reason?

For me it was the night circus it was just so slow to get into, and any diary/journal entry style books I just cannot read them they irk me.

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One I totally struggled through was sharp objects by Gillian Flynn, who also wrote gone girl which was a pretty popular movie adaptation. Sharp objects got a tv series which frankly made more sense than the book which hardly ever happens. But oh my god it was drawn out chapters of absolutely fuck all going on, random characters popping up for no reason like I'm supposed to remember all these people? The plot twist was obvious half way through the book.
Is there any books that you DNF (did not finish)? What was the reason?
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