Authorship and Origin:

The says that it is written by a youth taken from Judah in the deportation around 605 B.C.. The book includes stories of Daniel's training and rise to power in the Babylon empire's administration.

Overview and Significant sections

This book records the personal history of Daniel, and his prophetic visions of the future. His visions include near time events to occur and events in the very distant future. He predicts political history from Babylon's rule to New Testament times. The book can be easily divided into two distinct sections; Daniel's life and work (chapters 1-6), and his vision's and prophecy (chapters 7-12). The book gave confidence to the people of his day, as it can today, that God is in control, and in charge of history.

Significant sections:

For more detailed study:
Read Chapter 1. (the entire book is available starting here.)
The Concise Matthew Henry Commentary on this book.
bible.org introduction of this book.
the World Wide Study Bible has Dictionary, Commentary, Scripture and sermons available on this book.