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O Lord, when they that were sent by king Sennacherib blasphemed thee, an angel went out, and slew of them a hundred and eighty 7:41
The first nine chapters of First Chronicles are good examples of the "endless genealogies" that Paul tells us to avoid (see 1 Timothy 1:4 and Titus 3:9).
Wearisome as these chapters are, the rest of the book isn't much better. Consequently, First Chronicles is probably the most boring book in the Bible -- maybe the most boring book in all of literature.
First Chronicles covers the same material that is covered elsewhere in the Bible, adding a lot of contradictions while making it even more boring.
Highlights (such as they are):