In this second volume of the acclaimed new Vertigo series, Blythe's mysterious rescuer reveals the truth behind one of the most shocking disappearances in aviation history - a secret tied to the origin of hyperprax flight. Then, as the race to find a mysterious device begins, Blythe must master her skills as a hyperpract - regardless of her own acrophobia. Don't miss this second AIR collection, featuring issues #6 - 10.