Ether — J.S. Frankel

Teenager Sam Timmins, school outcast and total nerd, is saved one day from getting run over by the wind. Only it isn't the wind that saves him, but a mysterious wind-sprite named Esther. The result of a botched lab experiment, Esther and her mother, Nita, the lead scientist on a matter-transportation project, now exist as wind beings.

Sam begins a relationship with Esther, even though he cannot see or even hold Esther, but they grow as close as two people can under the circumstances.

The forces of evil, though, will not be denied. Morton Ramsay, the head of the project, needs Esther and Nita back for his own purposes. He sends his two chief henchmen, Harsky and Stutch, to intimidate Sam. When that doesn't work, they resort to murdering his mother.

Now, Sam is out for revenge. Aided by Esther and her mother, he finds out just who he is and what he is capable of. More than that, he finds out what science is capable of creating -- and destroying.