I typically have a hard time with Christian Fiction, because, to agree with a few of the reviews, that genre tends to be too "in-your-face" or too "Christian-cliché." I happen to be someone who knows God to be much more than cute quotes and easy street, so I get slightly repulsed by those types of books because they do not accurately portray the difficulty of life -- with and without God.
While granting my limited knowledge of this category, I found Arena to be an incredible example of the walk of a Christian. No two Christians have the same testimony as to how they found God, and this book introduces a lot of different angles (while focusing on Callie's story of course). Also granted, is that no book is perfect or will be able to cover all of the intricacies included in finding and following God, so of course this book can not cover them all either.
Where a lot of Hancock's allegory can be seen as "obvious" to those comfortable in the genre and the Christian walk in general, others may be able to glean new insight from her presentation. She begins where all begin: dropped into a world unknown unsure as to what the next step is. Each character will either find their way to the "God" representative character, or they won't. Hancock intertwines the problems we fact today in easy to relate to situations, effectively showing how different people will react differently. Temptation, fear, anger, lust, depression, all of these (and more) topics we face today -- Christians and non-Christians alike -- are all introduced to Callie or Pierce, oftentimes with a contrasting minor character who handles a similar situation differently.
Each section of the book promotes the characters to the next level of their journey (or faith, to follow the allegory). Some characters make it, some don't, which also is seen in today's world with Christianity. The characters must mature in their understanding and abilities as they fight to reach truth and return home, and it was creative and enrapturing to me how Hancock was able to convey the relevance to people today.
I recommend this book to all because Christians and non-Christians alike do, and will, face the same emotional and spiritual torments these characters go through, and only our choices and reactions will determine where we go next. However, I do recommend reading it with full knowledge of the sub-novel story being one of the Christian walk. Approaching it this way may help avoid being broadsided when it pops out. It is Christian fiction after all.
I read this first about 6 or so years ago and it still remains my favorite Christian fiction.