Fifty-five pioneers had died on the “bridge of bones” that spanned the Void to the rusty plains of Mars. Now the fifty-sixth stood on the red planet, his only ship a total wreck—and knew that Earth was doomed unless he could send a warning within hours.
"He was honored by fans with three Hugo awards and by colleagues with one Nebula award and was named the third Grand Master by the Science Fiction and Fantasy Writers of America (SFWA) in 1977." (Wikipedia)
After 55 astronauts died trying to reach Mars, including his own brother, Scott Nixon is determined to make it despite a cryptic warning from the Martians to stay away. Shortly after, however, they send automated rockets to Earth containing seeds for a type of flower that turns out to be invasive in our world’s rich soil and generous sunlight.
After taking off for Mars, Nixon discovers his friend and former pilot, Jimmy Baldwin, stowed away on his ship. Upon landing on the red planet, Nixon receives a second shock when he finds his brother, Hugh, alive. Although Hugh survived, his co-pilot did not and their ship was destroyed. A day later, Scott’s ship explodes as a result of sabotage by Jimmy, his mind under Martian control.
Scott and Hugh eventually determine how the unseen Martians plan to colonize Earth, but can they get a message home in time to stop it?
The part about the rocket shooting off reminded me about how drag racers describe that initial start when you cut down the tree. I like that pre-moon landing understanding about what sort of folks would survive a space voyage and why it was more than just hopping in a rocket and going. It's the sort of thing that racers would appreciate.