Take Me To Your Leader! (Flight Knights, Book 2)

WACKY TEACHER – OR – ALIEN CREATURE?
Lately, Parker's little brother, Tommy, has been acting weird. Like—extraterrestrial—kind of weird.
But Parker doesn't have time for Tommy's alien behavior.
The Flight Knights are on a DANGEROUS mission. A SEARCH and DESTROY—real aliens—Mission!
The Top Suspect?
Wacky Mr. Mackey, the school science teacher.
Alarming things are coming out of Wacky Mackey’s garage. Stellar bursts of light. High-pitched screams. Coffin-shaped space vessels.
But he’s a science teacher, so no big deal, right? WRONG.
It’s a VERY BIG DEAL especially when Parker spots Tommy coming out.
No way Tommy is an alien.
Is there?