The Black Hole Gate
NASA scientists discover a black hole that opens a path to a far planet with Earth-like conditions and dangerous invasive creatures. When the creatures begin crossing into Earth and killing humans and animals, the team races to understand the gate, stop the intrusions, and close it before the attacks spread beyond control.
One story. Three levels.
Read this story at three aligned English levels. Switch between L1, L2 and L3 while you read.