i LOVED this book. i devoured like 80% of it in one day after getting pulled away from it at 20% the day before, but i really did consider pulling an all nighter to just power through. 
it was extremely well written, and clearly super well researched (even though i don’t know enough about space to call out any inaccurate info, but it really doesn’t matter) 
mark was such a great character to follow and i loved his commentary through all the stuff he had to deal with on mars. kept my attention insanely well and was just so interesting all the way through! i thought we’d get a little more of what happened when he got back to earth but after the whole ordeal of getting him into the ship i get why it just ended there. 
so silly too which i was only partially expecting since i had read project hail mary. i definitely need to read artemis since i absolutely devoured his other two books. the characters from earth all sort of blended together for me, but i did like the look into what everyone was doing at home to try and save him, especially when we would know information mark didn’t.