The group accepts book donations from residents who drop off books with Wescott librarians. They also receive donations from the library.
Throughout the year, a group of dedicated volunteers sorts books into categories, such as non-fiction, mystery, children, science fiction and many more, Welnecke said.
When the time of the book sale arrives, they can have everything set up in a little under a week.
Welnecke said she thought they usually start with about 20,000 books on sale. The books cover the tables, including underneath the tables, and in side rooms. As books leave the tables, volunteers bring out more.