Friday

Barnes & Noble Booksellers

Tanglewood and Christiansburg

7 p.m.: Potion making, a sorting hat, costume contest and various story times. Preordered books will be handed out at midnight.

776-2960 (Roanoke)

381-4923 (Christiansburg)

Easy Chair Bookstore

Blacksburg

10 p.m. to midnight: A dramatic reading challenge, trivia challenge, costume contest and scavenger hunt.

552-BOOK

Coffee Buy the Book

Pulaski

9 p.m. to 1 a.m.: Snacks, games and book readings.

980-4424

Montgomery-Floyd Regional Library

Christiansburg branch

2 p.m.: Forbidden Forest Scavenger Hunt. Showing of fourth movie in the “Harry Potter” film series.

Blacksburg branch

Noon: Sorting ceremony

2 p.m.: Showing of fourth movie in the “Harry Potter” film series.

Meadowbrook branch

1 p.m.: Marauder’s Map Hunt. Follow the Marauder’s map through the library for this scavenger hunt with a prize at the end. All those who come in costume will receive a prize.

Showing of fourth movie in the “Harry Potter” film series.

3 p.m.: Costume party

Books-a-Million

1515 Hershberger Road, Roanoke 9 p.m.: Featuring face-painting, a skit and costume contest. 2705 Market St., Christiansburg 9 p.m.: Featuring trivia, a costume contest and activity stations.

Wal-Mart stores

4210 Franklin Road, Roanoke

8 p.m.: Cake and Harry Potter paraphernalia. Books will be distributed at midnight.

1851 West Main St., Salem

8 p.m.: Costume party and trivia.

550 Old Franklin Turnpike, Rocky Mount

11 p.m.: Featuring gift-card giveaways to customers in costume.

Saturday

Jessie Peterman Memorial Library

Floyd

11 a.m.: What will happen to our young wizard this year? The third installment of J.K. Rowling’s favorite characters.

2 p.m.: Showing of fourth movie in the “Harry Potter” film series.

Roanoke City libraries

Main branch, 706 South Jefferson St.

9 a.m. to noon: Costume contest and trivia. The Mill Mountain Zoo will bring Potter-related animals at 11 a.m.

Williamson Road branch, 3837 Williamson Road

2 p.m.: Review of previous Harry Potter books; readings from the newest book and discussion of the different covers.