Summer Crash (Zerralon 1.1)

Summer comes to a crashing end…
Ten-year-old Kevin Taggert prefers to stay home with his video games, but his parents insist he join a summer sports program. Exactly on the day the Vordac raid Earth. With his little sister depending on him for protection, Kevin must find the strength and wisdom to save them both.
Before they both end up dead, or even worse: as life-long slaves of the Vordac.
The 25th Century: a time of aliens, robots, artificial intelligences, great wonders, and deadly dangers. Follow the young human Kevin Taggert on his science fiction adventures to save his family and planet… and the discovery that sometimes one person can make the difference.