It's been 99 years since Yellowstone park erupted, causing a mass extinction and plunging the world into an ice age. Survivors are living in a structure dubbed the Greenhouse. They believe they're the only survivors, until a message appears on the outside of the glass. Jack Paul lives in a land of ice and snow, and Ruby Hammond lives in a lush, tropical world where the sun always shines. Even though they're from such different world, their fates are so intertwined that they are destined to meet.

Psychology, if it's your cup of tea, opens doors to a lot of interesting characteristics and traits that human beings encompass. Reading about it will not only give a meaningful perspective to how you see the world, but will also allow you to reach out and understand people around you better.