Book: The Martian
Right now in my book, mark has just finished his journey. In the part of the book I've read today, it had a twist and he changed his path to a old rover, instead of the next place "help" is coming.
The book explains why he did this, and he did it because he wanted to use it for communication. I thought that this was confusing, because it would be pretty dang hard to fix a rover and use it for communication, but then mark explains how he is trained to fix things, and is a mechanic. I guess that makes sense, because he is in NASA and was probably taught this stuff. I'm hoping that he could use it for communication, but I don't know if that will work.