"The Infinite Sea" by Rick Yancey is a science fiction novel intended for a young adult audience. It follows a group of teenagers and children, especially protagonists Cassie and Ringer, as they adapt to and survive in a post-apocalyptic world threatened by alien entities intent on squashing humanity. Overcoming their fears, the characters face each new challenge with bravery and purpose as they define what it means to be human.

Ringer leaves her group at Walker Hotel as she sets out in search of a new hideout, but when she is followed, she shoots her pursuer who turns out to be her young friend, Teacup. Evaluating the risks as the enemy approaches, Ringer decides against abandoning or killing Teacup.

While Cassie and Sam struggle with their father's death, Teacup sneaks off to follow Ringer, and Poundcake follows to retrieve her. When Dumbo disappears as well, Cassie and Zombie search for the intruder who …show more content…
Intent on keeping his promise to return to Cassie, he incapacitates Grace and escapes, but she follows him. They are attacked, allowing Evan to flee to Walker Hotel where his stealthy entrance causes Cassie to attack him.

At age eight, Poundcake is put in charge of his three-year-old brother and stops talking when the younger boy disappears. Poundcake is captured and trained as a soldier for the Others.

Despite her anger at him, Cassie nurses her beloved Evan, fearing he will die. A chopper deposits Megan at the hotel, and furious that Vosch is using young children as bombs, Cassie disables the bomb and saves the girl's life with Evan's guidance. Grace arrives at the hotel and attacks, fatally wounding Poundcake. Evan insists Cassie and her friends leave, entrusting Cassie with the bomb to attack the mothership and end it all. While they are still in the parking lot, an explosion rocks the