The 15 Keys

The 15 Keys is the first book in The 15 Keys saga, and it depicts the story of Zach and Lucy falling in love. The story also features many relationships between characters and a location called The Nexus

Main characters:

 * Zach
 * Hopey
 * Lucy

Supporting Characters:

 * Monica
 * Sarah
 * Thomas

Antagonists:

 * The invader