This book is hilariously bad. As a space exploration nerd and former aerospace engineering student, I think I am qualified to say nothing in this story is even remotely realistic. The writing is very repetitive and inconsistent. And yet it was kinda fun?
Their engine is so amazingly powerful that the trip to Mars takes only 35 days and yet they have to endure microgravity the entire time, except of course whenever someone needs to dramatically collapse against a wall they suddenly appear to have normal gravity. The stars outside the space ship's windows shimmer as if deep space has an atmophere. The crew randomly runs out of food and water and even oxygen during the trip and yet manages to reach Mars alive. They face very similar CO2 crises three times and yet learn nothing from the experience. But rest assured, everyone's eyes will glint with renewed determination no matter what.