Daniel had the most incredible career imaginable; he was transported as a teenage captive to a pagan empire and became the primary confidante to the ruler of Babylon. When Babylonia was taken over by its enemies, he rose to the second or third position in the Persian Empire. There are only two people in the Bible other than Jesus Christ of which no evil is spoken, Joseph and Daniel.
The book of Daniel is in two halves: the first six chapters are historical, which deal with the adventures and career of this remarkable man. The second six chapters are some of the most pivotal and important prophecies of the entire Bible. Without a clear understanding of the book of Daniel, you will not understand the times in which we live.