Skyhook — John J. Nance

Skyhook is a top-secret, high-tech computer program designed to save planes in trouble. But when a test flight goes awry over the Gulf of Alaska, Ben Cole, the brains behind the experiment, finds another kind of trouble as he searches for the suspected saboteur...

Meanwhile, April Rosen takes off on her own investigation--to exonerate her pilot father, who narrowly escaped his own midair collision over the same patch of sea...

Now, both of them are up against the shadowy forces of a government whose intentions seem far less than honorable. And when their paths cross, the quest to discover Skyhook's real purpose, and real dangers, will unite them in a dangerous fight for the truth...