If you mean 'What do you call someone who repairs books?' then I think the answer is a 'bookbinder'.
Sources: 'Inkheart' by Cornelia Funke
I think the most proper name would be glazier, which is someone who installs and repairs glass.
What you call person who fixes light
Horologist
He FIxes Books
A person who fixes the glass portion of windows is called a glazier.
If for instance you have a whirpool refrigerator I would look in the phone book under appliance repair and see who fixes that brand. Next I would call the store I bought it from, and ask who does their warranty work.
Horologist .
Horologist .
A Mechanic
A mechanic.
repairs
A person who fixes compasses is typically known as a compass adjuster or compass technician.