Edward has become so fearful of going outside of his home alone, and of being in open spaces such as parking lots, that he has difficulty holding a job. This is best described as .

Agoraphobia.

Explanation:

This can be simply be explained to be in a situation of fear which a person finds himself that is a clear to him that escape will when be difficult or it is clear that help will be difficult in case something is seen to go wrong.

Agoraphobia is seen to built a fortress in a lot of people after they must have had one or more panic attacks, causing them to worry about having another attack and avoid the places where it may happen again. People down with this agoraphobia are seen to posses hard time feeling safe in any public place, especially where crowds gather. You may feel that you need a companion, such as a relative or friend, to go with you to public places. Its symptoms may be seen in forms of people with it being in enclosed spaces, such as movie theaters, elevators or small stores

Open spaces, such as parking lots, bridges or malls.