Molly of Mars

From Book 1: Molly Lennox is a typical teenager, living a typical teenage life on the planet of Mars. Her alien sister, Pirra, and her best friend, Vicky Valentine, are always ready to assist her on her latest adventure. Molly's mother has been coming down hard on her lately and she can't figure out why. She is on her last chance or else.

But when she witnesses a kidnapping and no one believes her, her unrelenting determination and undying guilt from the alien war drive her to catch the perpetrators. She grabs her trusty stun gun and she risks everything, including her family to rescue the victims and uncover a dark Martian secret.

For ages 10+ (like Harry Potter)

Check out www.mollyofmars.com and the all the books in the Molly of Mars series:
Molly of Mars and the Alien Syndicate
Molly of Mars and the Alien Nebula
Molly of Mars and her Alien Sister
Molly of Mars and the Alien Creatures

Molly of Mars in Pirra's World: Alien Spacegates
Molly of Mars in Pirra's World: Alien Cages
Molly of Mars in Pirra's World: Alien Revolt

Or try my other series, Lunara.