Stories drawn from faith can carry deep questions with a light touch. Amish Tripathi's Shiva Trilogy is a famous example of mythological fiction. Explore modern fiction, or turn to religious books for the scriptures themselves.
Readers who enjoy these books often go on to read the original epics too, which adds great depth to what they first met as a story.
The best way to find a novel you love is to follow your mood. Read the first few pages, trust your instinct, and never feel guilty about setting aside a book that does not grab you.