Zacharias is considered one of those books where there are prophecies about the second coming of Christ and the renewal of Israel. There are even parts of that book that look as if we are reading the book of Revelation.
This book also introduces God as sovereign of Israel and of all the earth:
6 And it shall come to pass in that day, that the light shall not be clear, nor dark:
7 But it shall be one day which shall be known to the Lord, not day, nor night: but it shall come to pass, that at evening time it shall be light.
8 And it shall be in that day, that living waters shall go out from Jerusalem; half of them toward the former sea, and half of them toward the hinder sea: in summer and in winter shall it be.
9 And the Lord shall be king over all the earth: in that day shall there be one Lord, and his name one.
Zacharias 14:6-9 (KJV)