Authorship and Origin:

Zechariah was a contemporary of Haggai who was also around the time of Ezra and Nehemiah. Chapter 1 of the book discusses Zechariah's family and identifies him as a member of the priestly family (Neh 12:4, 16).

Overview and Significant sections

This book is apocalyptic, that is, like Revelation, it looks into the distant future through a series of symbols, shapes, and images which are sometimes difficult to understand. Zechariah however is important for the reason that it is a source of understanding for the symbolism in Revelation. Like other prophetic writings, some things will be only understood when the words are fulfilled.

The book can be divided into three major sections:

For more detailed study:
Read it. (the entire book is available here.)
The Concise Matthew Henry Commentary on this book.
bible.org study of this book.
the World Wide Study Bible has Dictionary, Commentary, Scripture and sermons available on this book.