In the book. — It is doubtful what “the book” here means. The Vulgate explains it of the Book of Esther itself, and so many modern scholars. Still “the book” hardly seems a natural Hebrew way of referring to a work on the part of its author as he writes it, and no similar case is adducible. Others think it must have been a book written at the time on the subject of the festival, which is, perhaps, possible. Canon Rawlinson identifies it with “the Book of the Chronicles of the Kings of Media and Persia.” Because such is the use of the word book elsewhere in Esther.
Related Commentaries of Esther 9:32
Esther 9:32
32 And the decree of Esther confirmed these matters of Purim; and it was written in the book.