The Martian

I enjoyed The Martian by Andy Weir which is mainly set on Mars.  Mark Watney was presumed dead following an incident after he and others had landed on Mars from their mothercraft, "Hermes".  When Watney regains consciousness he realises he has been left behind and that he will have to work out how to survive until he can be rescued.  He proves to be very resourceful as he builds a potato farm and finds a way of communicating with Earth.  From then the whole world is "barracking" for him, hoping he can survive.  But how can he surmount the seemingly impossible odds?  I found the chemistry hard to follow, went right over my head.  It all seemed very realistic and then the suspense of wondering whether he will survive. (I have not seen the movie). 4/5