Twe12ve: Twelve keys, one secret.

Twelve keys, one secret.
Odin and his twelve sons guard the secret to prolonging human life. The secret, kept deep in a vault in Ragnorok, can only be revealed when humans stop intentionally killing one another.
Twelve humans hold the keys to open the vault, but during centuries of complacency, Odin has lost track of the keyholders. Two keyholders now remain, and Odin awakens to their existence.
Can Odin and his sons protect the last two keyholders, or will Loki, Odin's greatest rival, destroy everything Odin holds dear and seize control of Ragnorok?

***Please note: While this book contains references to Norse Gods, the author has altered some of the names of Gods, events, and place names (e.g., in the original tales, Ragnarok is a series of events including a battle, in 'Twe12ve', Ragnorok is a place.) Thank you for your understanding.