Writing Prompt 51: What will your book be about?

Prompt: The book you want to write. What's going to be in it?

An epic journey.
A world with it's own mythology and religion.
A growing up tale where the characters learn and change.
A challenge between the head and heart.
Magic.
Adventure.
Philosophy.
Beauty.
Mystery.
Many important characters like Gods and Goddesses.
Two evil villians.
A lake that reflects the stars.
A desert made of moon sand.
The ultimate test of light and dark.
A history of an ongoing custom.
Forbidden uses of magic and power.
A ruby palace.
An ice wasteland.
A sapphire forest.
Magical beings called starsouls.
A faelin.
A foi.