Zita the Spacegirl

Uhhhhh. I don't get it. My library friends love this book. I got annoyed. Here's the rundown though...

Zita and her friend come across a fresh meteoroid that has a device with a red button sitting there. Zita dares to push the button and her friend gets dragged into another world. Zita decides to push the button again to go after him. In this world Zita is a hero.