Better yet, find out when the local library holds their annual book sale and offer your books for that event.

最好弄清楚当地图书馆什么时候举办年度图书特卖场，把你的书送到那里。

youdao

If they don't hold one, organize a book sale to benefit your library.

如果它们不举办此类卖场，你可以组织一个图书特卖会并把收入捐给图书馆。

youdao

My local library has a book sale the first Saturday of each month.

FORBES: Affordable Professional Development in a Tight Economy