The book of 1st Chronicles is a book of Narrative History, and Genealogies. The author appears to be the prophet Ezra who wrote it circa 430 B.C. It covers the events from 1000 to 960 B.C. Key personalities are King David and Solomon.
This book parallels some of 2nd Samuel, and therefore describes similar events. It was written after the exile, its purpose was to encourage the remnant that had come out of the Babylonian captivity. It begins with the ancestry of the nation’s past, but it is not chronological.