Expansion is the second science fiction book in the series Dungeon Robotics by Matthew Peed.
Robia Valley recovers from the death attack, and Regan and Louella work to increase their strength to meet the challenges to come. Forces move to unidentified vehicles. Adventurers come from far and wide to test their strength in the rumored dungeon.

The emergence of the first Adventurers who dared to enter the depths of the new Dungeon, the shape of an individual Dungeon Core story different from all others; evolving, like the model of the Mandelbrot Algorithm, into a truly unique portrait of the Dungeon Universe.