1 Chronicles covers the same time period as 2 Samuel, both describing the reign of David. 1 Chronicles, possibly authored by Ezra, was written to the returning remnant who were rebuilding Jerusalem after their 70 year exile in Babylon.
The genealogies seem boring to us, yet they were important to the Jewish people, and to record the Jewish line that would eventually culminate in the birth of the Messiah, Jesus Christ. Many of the records were probably lost during the seige and exile of Jerusalem, and these records tied the pre-exile with the post-exile period.
I am thankful that, though the Jews were God's chosen people, He opened the way of salvation to everyone.
In Jude we find the truth the the Bible is the very Word of God. The Bible is the one source we can trust for absolute truth. There have always been and always will be people who try to twist the Word of God and to spread false teachings that are fortified with just enough truth to be believable - and, therefore, dangerous. He charges us to contend for the faith, and to live out the love of God.
Tomorrow's Bible In a Year Passage passage: 1 Chronicles 4-6; Luke 1:1-20