1. Loyalty and Friendship: The story emphasizes the importance of loyalty and friendship. Percy finds true friends in Grover and Annabeth, who support and help him throughout his journey.
2. Identity and Self-Discovery: Percy's journey is a quest for self-discovery as he learns about his true identity as a demigod and navigates the world of Greek mythology.
3. Courage and Overcoming Fear: Percy must face his fears and insecurities as he embarks on dangerous quests, demonstrating the power of courage and determination.
4. Family and Legacy: Percy's relationship with his father, Poseidon, and the exploration of his lineage become central themes as he grapples with his newfound divine heritage.
5. Fate and Destiny: The prophecy surrounding the stolen lightning bolt influences the story, exploring the concept of fate and the choices characters make that shape their destinies.
6. Responsibility and Duty: Percy's newfound powers and responsibilities as a demigod come with the challenges of fulfilling his role in protecting the world from ancient threats.
These themes intertwine throughout the novel, providing depth and resonance to the story and character arcs in Percy Jackson and the Lightning Thief.