Marooned in a Strange Land by W James Dickinson

MAROONED in a strange land What seemed like an exciting survey mission on a new world, turns ugly, when a freak solar storm wipes out all of the colonists’ technology. Marooned hundreds of kilometers from any help, Jamie and Amanda are forced to use their limited resources and a great deal of imagination to survive in this harsh environment. To make things worse, the planet is home to a deadly predator, that comes after dark on huge leathery wings. With time running out, how will these fragile humans find their way to safety? An old book, a pocket knife, an indigenous species, and a strange crystal may hold the answers.