The book called the Iddo Genealogies is one of the Lost books of the Old Testament. It was attributed to the Biblical Prophet Iddo, who is said to have lived at the time of Rehoboam. The book is described at 2Chronicles 12:15. The passage reads: "Now the acts of Rehoboam, first and last, are they not written in the book of Shemaiah the prophet, and of Iddo the seer concerning genealogies? And there were wars between Rehoboam and Jeroboam continually."
This text is sometimes called The Genealogies of Iddo the Seer or The Acts of Iddo the Seer [1].
The book is found nowhere in the Old Testament, so it is presumed to have been lost or removed from the earlier texts.