The book is really good but some parts of the story is very confusing and boring. Most of the time they were talking scientific stuff and I only understand half of what they were saying. My mind got played by the scientific vocabulary and terms. The boring parts of the story was all the traveling they did. Sometimes of the story they would travel and stop and that it. But the amazing thing of the story is that how scientists are trying to make mar a habitable place to live on like earth. It reminded me of a news article where people are trying to make mars a habitable place to live. I wouldn't recommended the book to people who get mad easily at story that is very confusing due to the terms.