Generally, readers are generous with their stars and give 3-5 stars to books they like. I pass on books with an abundance of 1-2 star ratings. For books with a majority of 3-5 stars and a few 1-2 stars, I'll read the individual reviews to see if there are problems that would hinder my enjoyment.
But I tend to sample books on my Kindle before buying, so the star ratings aren't all that important to me. If I like the sample, I'll get the book. I'll pass on a 5-star book if I can't get through the sample!
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