The Knight in Rusty Armor

The Knight in Rusty Armor is a 1987 novella by Robert Fisher. It tells the tale of a knight obsessed with being a knight, so much so that he spends all his time in his armor and completely alienates his family. One day, he discovers that he cannot take his armor off, not even able to lift his visor for meals. He learns that the wizard Merlin may be able to help him, so he sets out to find him.