@Background Pony #A379  
What’s the alternative?

I understand getting inspiration from the movie… but the rover from the movie is… not proper…

@Background Pony #ECF4  
 
Avonder says “I don’t know where you’re looking for the first part, the rover and trailer are clearly standing at an angle.”
 
Messaged him; he gave me permission to pass along his response to here.
 
To summarize, it’s a perspective issue. It’s the angle we’re viewing it from.

@Background Pony #ECF4  
The rover and the MAV (Phoenix) here look exactly as they do in the movie.

A-ma-zing. Read “The Maretian”, loved it, came for the artwork, and boy it’s great. I kinda can nitpick about it being not very true to the story (Friendship hull is not secured to the rover, rover itself looks like a single, monolithic vehicle instead of being a two-part trailer (it really should have looked like one of the 18-wheelers except the puller and the trailer should be almost equal in length), and the front chassis of Friendship is missing (which, in-universe, supports it’s overhanging nose)).  
But I wrote all that nitpicking mostly because I saw something reminding me of that story and it made me trip down the memory lane, so good job!

@LordHeadcheez  
Perhaps the price for one book will be lower in the future if he sells enough.

Holy crap on a cracker this is awesome! The Maretian was one of my favourite experiences on FIMFiction. I went in expecting a silly crossover, and it ended up just as good as the original book! Whenever I think of a Mark Watney quote, I have to stop and think “Which book?”
 
The only downside is the price. I’m happy there is a physical book, and I wish it well, but $150 is out of my price range for the moment. Maybe someday.

@Background Pony #8871  
That’s Fireball and Mark Watney standing next to each other.

@Background Pony #8871  
Confirmed in the associated story.

@FanOfMostEverything  
just looks like a space suit, could be any number of humanoid species

@Background Pony #8871  
The fellow on the left is a dragon. Note the leg anatomy.

why is this tagged dragon?

That is gorgeous!

The second time the Ares III rover has been drawn in the context of ponies!  

Behold: the Whinnybego.