Betrayal's Shadow, The Guardians of Eden Book 1

Turen is willing to forfeit himself to change the future of his Guardian race. Extinction isn’t an option for mankind will perish as well. No risk is too great. Until a human female materializes inside of his prison cell. Mia Bowman has never heard of the Guardians. And Turen’s warnings to stay clear of his people’s problems don’t invite her to learn more. But if she can ferret out the lies and reveal an ancient tale of murder and deceit, what is the life of one person compared to saving an entire race?