Joey Harker is a hero. After mastering the ability to walk between dimensions, Joey helped save the Altiverse from destruction. But the rival powers—one of magic, one of science—who seek to control all worlds are still out there, and InterWorld's peacekeeping mission is far from finished. When a stranger named Acacia does the impossible and follows Joey back to BaseTown, things get complicated. No one knows who she is or where she's from—or how she knows so much about InterWorld. Dangerous times lie ahead for Joey and the mission. There's a traitor in the group of Freedom Fighters, and if Joey has any hope of saving InterWorld, the Altiverse, and the mission, he's going to have to rely on his wits—and, just possibly, on the mysterious Acacia Jones. The Silver Dream is a riveting sequel to InterWorld, full of bravery, loyalty, time and space travel, and the future of a young man who is more powerful than he realizes.