The Sun and the Star is a fantasy adventure novel set in the world of Percy Jackson and the Olympians. It is the first book in The Nico Di Angelo Adventures series and focuses on fan-favorite demigod Nico di Angelo, son of Hades, alongside his boyfriend Will Solace, son of Apollo. The novel is written by Rick Riordan and Mark Oshiro.

The story follows Nico and Will on a dangerous quest into Tartarus, the deepest and darkest region of the Underworld, as they attempt to rescue an old friend while facing monsters, personal fears, and challenges to their relationship. 

Nico di Angelo has always been familiar with darkness. As the son of Hades, he has experienced loss, loneliness, and battles against powerful forces. However, Nico finally has someone who understands him: Will Solace, the son of Apollo and a symbol of light in Nico's life.

When Nico begins hearing a mysterious voice calling from Tartarus, he believes it may belong to Bob (Iapetus), the reformed Titan who helped Percy Jackson and Annabeth Chase escape from the Underworld. A prophecy reveals that Nico must undertake a dangerous mission, and Will insists on joining him.

Together, they must travel into the darkest place in existence, where Nico's connection to death and Will's connection to sunlight are tested like never before.

Main Characters

Nico di Angelo

Role: Main protagonist

• Son of Hades, god of the Underworld
• A powerful child of the Underworld with abilities involving shadows and the dead
• Has struggled with grief, isolation, and acceptance
• Learns to confront his fears and understand himself

Will Solace

Role: Co-protagonist

• Son of Apollo, god of the sun, healing, and music
• Nico's boyfriend
• Represents hope, warmth, and compassion
• Must face the dangers of a world completely opposite to his nature

Bob (Iapetus)

Role: Character connected to the quest

• A former Titan
• Previously helped Percy and Annabeth
• His disappearance becomes the reason Nico begins the journey into Tartarus

Rachel Elizabeth Dare

Role: Prophecy giver

• The Oracle of Delphi
• Provides information that guides Nico's quest

Major Themes

1. Light and Darkness

The contrast between Nico and Will represents the balance between darkness and hope. The story explores how two very different people can support and strengthen each other.