Far World Air Keep by J. Scott Savage

Far World Air Keep by J. Scott Savage continues the story of Kyja and Marcus, two friends from different worlds.  Kyja, from Far World, can't do magic, while everyone else, even the chickens, can.  Marcus, from Earth, can't walk, and needs a wheelchair to get around.  Alone, they can't do much, but together, they've got a chance.  In Air Keep, Marcus and Kyja have successfully gotten the Water Elementals and the Land Elementals to help them, and now must secure the help of the Air Elementals.  Will they be sucessful?  You'll just have to wait and find out.