People can drop in with their ceramic items and share their stories with the artist who will photograph the items and ask the owner to fill out some details.
If some objects are too fragile or too large to transport, owners can supply a photograph of their treasure.
"The work that I produce won't necessarily look like the supplied item," says Fitzharris.
"It will be a response to it and may have more to do with the story behind it."
Participants will be able to track the later stages of the project with the artist spending Wednesdays and Thursdays at Sarjeant on the Quay from early May until late June from 1.30pm-4.30pm.
Visitors will be able to see some of the objects she has made so far and learn how the "library of things" is growing.
Fitzharris says the work will navigate the lines between fiction and non-fiction and the resulting exhibition will take place late this year or early 2019.
The artist will also be giving an illustrated talk about her past and current work at Sarjeant on the Quay, May 1 at 7.30pm.
