After heroically saving his classmates, fifth-grader Sawyer's life as a dinosaur-human hybrid has gotten a lot easier until Sawyer, Sylvie, who is part Martian, and Elliot head to Mars in search of Sylvie's missing dad and discover that Mars is trying to kick Pluto out of the solar system.

Sacrifice, revolution, the promise of freedom. These flood into the life of Casseia Majumdar, daughter of the Binding Multiples. Rebelling against her conservative family, the colonists who occupy Mars, Casseia takes part in the brewing revolution sparked by student protests in the year 2171. Meanwhile, her love life is in a very precarious situation, with her beloved Charles Franklin's seeking to merge his mind with the most advanced artificial mind....

Fearing her dream of becoming a galaxy-traveling starship pilot will never come true when she is sent to Earth's Galileo Academy, Polly teams up with her popular brother to investigate dangerous coincidences centered on their high-profile classmates.

Studying the planets at school, Pedro learns fascinating facts about Mars. "En la escuela, Pedro ha estado leyendo libros sobre el planeta Marte. Cuando llega a casa, imagina cómo sería vivir en el planeta rojo. ¿Podría escalar la superficie rocosa de Marte? ¿Sobreviviría sin helado? ¿Será que su gran imaginación lo lleve a quedarse en Marte o decidirá que prefiere vivir en el planeta Tierra?"--

"Alan Saul is now part-human and part-machine, and our solar system isn't big enough to hold him. He craves the stars, but can't leave yet. His sister Var is trapped on Mars, on the wrong side of a rebellion, and Saul's human side won't let her die. He must leave Argus Station to stage a dangerous rescue -- but mutiny is brewing onboard, as Saul's robots make his crew feel increasingly redundant. Serene Galahad will do anything to prevent Saul's escape....

Darrow would have lived in peace, but his enemies brought him war. The Gold overlords demanded his obedience, hanged his wife, and enslaved his people. But Darrow is determined to fight back. Risking everything to transform himself and breach Gold society, Darrow has battled to survive the cutthroat rivalries that breed Society's mightiest warriors, climbed the ranks, and waited patiently to unleash the revolution that will tear the hierarchy apart...