Mylo's best friend Dibs is a Martian fanatic -- every unexplained phenomena could be explained by Martians, if he listened to Dibs. Mylo doesn't. He's more of a Superman kinda guy.
Dibs spends the night a lot, especially after Obie, Mylo's brother, dies. The boys are spending the night at Mylo's house, when there's a storm and something crashes in a blaze of light near his parents' Roswell, NM ranch. Dibs misses it (!) but Mylo hears a call for help in his head.
The boys and friend Gracie are warned away from the crash site, but you know what kids do when they're warned NOT to do something -- they have to investigate it.
Mylo finds a real Martian and he's a she, and she's not from Mars, she's from Europa and on a field trip, and the Army has her brother captive on base.
I won't spoil the ending! Enjoy the read.