One of the biggest things that I look for in any story is an ending that comes out of the beginning. (This is the main reason why you'll see Les Miserables is on my list...more on that when I get to it). A good story is bookended, crafting a conflict and resolving it. The Scriptures have the ultimate plot conflict: human sin, and the ultimate plot resolution: Christ. The entire Old Testament is a masterful story of the Hebrews and their struggles. The New Testament answers the Old, reconciling men to God, and ends with a ravishing prophecy of that eternal reconciliation.
A good book will also cause the reader to reflect on themselves and on the world, and will challenge the person to change them in some way. What could be more radical than the challenge to become like the crucified Christ?
The symbolism is deep and the foreshadowing ingenious. Any lover of literature must be in awe of the creative mystery conceived by the Scriptures.
I want to end with this profound quote from C.S. Lewis (a man whose books have influenced my philosophy tremendously). He wrote it in a letter to his friend Arthur Greeves in fall of 1931, talking about the Gospel as it stands in relation to other human stories (or rather, mythologies):
"Now the story of Christ is simply a true myth: a myth working on us in the same
way as the others, but with this tremendous difference that it really happened:
and one must be content to accept it in the same way, remembering that it is
God’s myth where the others are men’s myths: i.e. the Pagan stories are God
expressing Himself through the minds of poets, using such images as He found
there, while Christianity is God expressing Himself through what we call “real
things”. Therefore it is true, not in the sense of being a “description” of God
(that no finite mind could take in) but in the sense of being the way in which
God chooses to (or can) appear to our faculties."