The only means of survival is finding your way through various intricate puzzle. (dualpixels.com)
As others have said, the title of the work seems to be symbolic and reflects Linda's upbringing and lifestyle - running free about the forest, largely fending for herself as means of survival. (bookbrowse.com)
This doesn't mean that we're physically prepared for some cataclysmic event in terms of having a well - stocked fallout shelter, but rather that we enjoy the mental exercise of imagining the imminent peril and possible means of survival for humans as a species. (relevantmagazine.com)