The Friends of the Mattapoisett Library’s big July book sale, held during Harbor Days week, will begin with a members-only preview on Wednesday, July 15 from 6 to 8 p.m., then continue July 16 to 18 from 10 a.m. until 4 p.m., at the library, 7 Barstow St.

Donations of good-quality books, audiobooks, CDs, DVDs and puzzles are sought for the sale. They can be brought to the library during business hours.

The Friends’ Jewelry and Accessory Sale will open with a members-only preview Friday, Aug. 21, from 6 to 8 p.m., and continue Saturday, Aug. 22 from 10 a.m. until 4 p.m. Donations of jewelry, handbags and scarves can also be brought to the library.

The members-only previews are an opportunity to become a member or to renew a membership. The Friends of the Mattapoisett Library is a charitable organization and donations are tax deductible. All proceeds benefit the library.