WIND IN TREES by Arthur M. Doweyko

Henry Wind In Trees is a Lakota Sioux native American. He is also a cyborg.  An asteroid strike and a viral outbreak that followed left few humans alive — those that were lucky to have their brains encased in impervious titanium skulls. At least that’s what the news said. Henry will discover the truth, but in no easy way. He, his ghost of a wife, a robot aide and an alien visitor will take a roller-coaster ride through a post-apocalyptic world where nothing is as it seems, as they discover the remarkable entity behind it all.