DK 
DK Super Readers Level 4 Mission to Mars 

Use your reading superpowers to learn all about Mars, the Red Planet — what we know about it and what we aim to find out — a high-quality, fun, non-fiction reader — carefully levelled to help children progress.
Mission to Mars is a beautifully designed reader all about Mars, from the earliest astronomers to observe it to the future of space travel and an imagined life on Mars for humans.
The engaging text has been carefully levelled using Lexiles so that children are set up to succeed.
A motivating introduction to using essential non-fiction reading skills.
Children will love to find out about how we have found out about Mars over the centuries, and what the future of space travel might bring.