What happens in a death cellar Crossword

This printable crossword puzzle on the topic of Middle Grade has 10 clues. Answers range from 3 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

What was the name of the room Jonah and Katherine are trapped in?
how did Katherine and Jonah escape the cellar?
What is the name of the futuristic device that turns Katherine and Jonah invisible?
What is the name of the disease Gavin(Alexei) has?
What did Jonah scream when he heard the guards coming?
Who was in charge of one sixth of the planet?
What are the ghostly figures that represent what would've happened if there wasn't such thing as time travelers called?
what is Olga, Tatina, and Maria to Gavin(Alexei)?
How did Gavin move around?
What was Jonah planning