My review of Mars Evacuees By Sophia McDougcall.

The story is about Alice Dare a twelve year old girl evacuated to Mars

to fight the Morrors, like her famous spacefighter mother. She had not seen her
mother for a long time and her father, who was an engineer laying mines under
the ice caps, for even longer.

The Morrors were invisible aliens who came to live on Earth at the Poles saying
they would reverse global warming but instead they started freezing the whole
planet by putting a light shield around it.

Travelling to Mars she meets Josephine a girl her age and they become friends.
Josephine liked to play the harmonica and liked collecting rocks. She was kind
to Alice and reassured her that Earth would be ok again. The book was very
descriptive about the planets and space and think it would appeal to
girls who like science fiction and space adventures.

 I enjoyed reading this book even though I could predict the ending.

http://www.lovereading4kids.co.uk/book/9598/Mars-Evacuees-by-Sophia-McDougall.html