Is Justice Possible? The Elusive Pursuit of What's Right by J. Paul Nyquist is a primer on why Christians should care about justice and ways in which to pursue justice.
Nyquist begins by defining justice. He then discusses reasons humans find justice hard to accomplish. The next section discusses how justice should be done, and the last asks the question of whether justice will ever be realized.
Is Justice Possible? includes anecdotes about justice not being done, or being delayed significantly. It also includes basic definitions and different ways American Christians can pursue justice in political, public, and personal arenas. This is probably the most helpful section.
Overall, Is Justice Possible? is an easy read. It is a thin book that serves as a basic introduction to the topic. Those who have never given justice more than a passing consideration will find reading this beneficial.