The main task of the Guild of Writers was to write links to Ages, though upper-class D'ni also knew how to write. Those who did not have the opportunity to learn to write Ages could visit the Ages whose books were kept in the Common Libraries.
Types of Ages
- Educational Age: written for education or observation. Not to be confused with a Lesson Age.
- Food Age: written solely for the purpose of growing food.
- Garden Age: written specifically for rest or relaxation.
- Lesson Age: an Age written to teach the Art.
- Prison Age: an Age where a criminal was imprisoned forever, without a linking book back.
- Library Age: an Age written for the easy access of many Linking Books.
- Sport Age: an Age used for recreational purposes.
- Guild Age: an Age that was used by one of the Guilds.
- Inhabited Age: an Age that already had a civilization living there before the D'ni wrote a link there.
- Private Age: an Age written for private use by a person or family.