Dear Gabe,
Petra has taken a liking to you, I can tell. She loves being around you, maybe more than she likes me. Radar likes you too, he's quite smart for his age. But since you're receiving this letter, you know what's already happened.
At the time I am writing this, I know I have to prepare for the worst, and it seems that has happened. I have been killed by Hadrian.
Please take care of Petra and Radar for me. I love them so much, I don't want them getting hurt.
When Petra turns sixteen, please tell her about the overworld. The children need to escape.
Best wishes for the next five years.
Sincerely,
Soren
