CHAPTER TWENTY-ONE Beams and Mr. Space walked along a long corridor on the bottom level of HQ. Mr. Space walked slightly in front, the Rubber Ball’s case held securely under his arms, while Beams walked slightly behind him at a slower pace. He glanced around at their surroundings every now and then, noticing how thick the walls were and how dark down here it seemed even with lights on the ceiling providing enough illumination for them to see where they were going. “Oh, it’s always been like this,” Mr. Space had remarked when Beams pointed this out earlier. “Level Six is the lowest level of HQ. There are no windows or anything because it’s where we keep all of the important stuff. Both the exterior and interior walls have more layers than the other parts of HQ. It can even detach and oper