Part 1. L. 1. After

The book is the second part of the Invention series by Lynn Icho.

The inventor of the photon engine, L Forster, makes a criminal deal with a certain Arthur Norrington in exchange for participation in the first ever expedition to Earth.
L hopes to outwit Norrington, but he turns out to be completely elusive. And to find out who this guy really is, L must first find out who he is himself...