Book 6 of Nova Terra:Titan. As you guessed it, this one has much more earthshaping in it. However, as the previous books have been building to, we have the giant battle. I won’t say which but one of the titles used in later books is acquired in this one. There are a number of things I am still waiting on, but loving the series and recommended it to my own son. Excited for book 7. Highly recommend.