“King Artaxerxes paid tribute to Mordecai on the land and on the islands of the sea. All the acts of his power and might with the full account of the high honor of Mordecai, to which the king advanced him, are they not written in the annals of the kings of Media and Persia? Mordecai the Jew was next in rank to King Artaxerxes. He was powerful among the Jews. He was popular with his many kindred. He sought the good of his people. He interceded for the welfare of all his descendents.”
This praise of Mordecai is similar to the kind of eulogies that you can find about the kings of Judah and Israel in the Book of Kings, and the Book of Chronicles. In other words, if you want more information, it is written in the annals of the kings of Media and Persia. He was especially good and powerful for the Jews. Strangely enough, Queen Esther seems to take a second place to Mordecai.