To be able to unpack the prophets well, we need to THINK ORACLE (Gordon Fee). Was this one oracle or many? When was it said? Who was the audience? Here is a fun video on types of oracles.
What is God like in this book?
For a quick overview of Amos http://www.insight.org/resources/bible/amos.html
For quiet time questions http://www.ivpress.com/bible/amos/