How Friends of the Library Sales Fund Libraries
Behind nearly every library book sale is a Friends of the Library group — a team of local volunteers who sort donations, price books, staff tables, and turn secondhand books into real support for their library. Understanding how these groups operate makes it easier to see why your purchase at a book sale matters, and how you can get more involved beyond just shopping.
What a Friends group actually is
A Friends of the Library group is typically an independent nonprofit organization formed by community members who want to support their local library beyond what its public funding covers. While Friends groups work closely with library staff and often meet in the library building, they are usually governed separately, with their own volunteer board, membership structure, and bank account. This independence lets them raise and spend money flexibly, outside of a municipal or institutional budget process, which is part of why book sales have remained such a durable fundraising tool for so many libraries.
Where the books come from
The inventory at a typical sale comes from two main sources. The first is community donations — people clearing bookshelves, downsizing, or handling an estate who bring boxes of books to the library or a designated donation point. The second is withdrawn items from the library's own collection, often called weeded books: titles taken out of circulation because they are outdated, damaged, rarely checked out, or duplicated elsewhere in the collection. Both sources are usually sorted by volunteers, who separate out anything too damaged to sell, organize by category, and price items based on general condition and perceived demand rather than formal market research.
This volunteer-driven sorting and pricing process is also why library sales are known for being significantly cheaper than retail used bookstores, and why they attract both casual readers and resellers looking to source inventory. For more on how resellers use this to their advantage, see our guide on how to find books to flip.
Where the proceeds typically go
Money raised at a book sale generally goes back into the library in ways that its regular operating budget may not cover. Common uses include funding children's and teen programming, summer reading events, author visits, museum or cultural pass programs, additional books and materials, technology upgrades, and furniture or space improvements. Because each Friends group sets its own priorities in coordination with library staff, the specific projects funded vary from library to library, and many groups publish an annual report or newsletter describing what a recent sale supported.
This is part of why attending a sale, even just to browse, has an impact beyond the books you personally take home: the volunteers running the sale are typically reinvesting what they raise directly into services the whole community uses.
How sales are run
Organizing a sale is largely a volunteer effort. Teams typically handle donation intake and sorting throughout the year, pricing and shelving before the sale, setting up tables and signage, staffing the sale itself, and handling the breakdown and donation or recycling of unsold books afterward. Larger sales often include a members-only preview night, several days open to the public, and a final discount or bag day to clear remaining stock. Some Friends groups also run a smaller, replenished bookstore inside the library year-round, in addition to their larger periodic sales.
How to volunteer or donate
Most Friends groups are glad to have more hands, whether that means sorting donations during the week, helping price and shelve books, staffing a shift during the sale, or helping with setup and breakdown. Many groups also welcome paid membership, which usually supports their ongoing work and sometimes includes early access to the preview night. If you have books to give away, check with your local library or Friends group about their donation policy first, since some have limits on volume, condition, or types of material they can accept. Contacting the library directly or checking its website is typically the fastest way to find your local Friends group and learn how they prefer to be supported.
Find a sale to support
If you want to see this cycle in action, browse upcoming library book sales or check our guide on the library book sale calendar to know when sales are most likely in your area. You can also search by ZIP code to find a sale happening near you soon.
Friends of the Library FAQs
- What is a Friends of the Library group?
- A Friends of the Library group is typically an independent nonprofit made up of community volunteers who support their local library, often by running book sales, a year-round book shop, and other fundraising activities. Most are separate from the library itself but work closely with library staff.
- Where do the books sold at these sales come from?
- Books generally come from two sources: donations from community members clearing out their own shelves, and withdrawn items from the library's own collection that are no longer being circulated. Both are typically sorted and priced by volunteers before a sale.
- What do book sale proceeds typically fund?
- Proceeds commonly support programs and resources that a library's regular budget may not fully cover, such as children's programming, summer reading events, museum pass programs, additional materials, technology, and furnishings. The exact use varies by library and Friends group.
- How can I get involved with a Friends of the Library group?
- Most groups welcome volunteers to help sort donations, price books, staff the sale, or set up and break down tables. Many also accept membership dues and book donations year-round. Contact your local library or check its website for Friends group information.