Wash down your pumpkin pasties with butterbeer. Watch Professor Sybill Patricia Trelawney, a witch and professor of divination, peer into her crystal ball. Beware of Aragog, the rare giant spider lurking in the Forbidden Forest, who has a taste for human flesh.

The Canyon Crest Towne Centre in Riverside will recreate the magic of Harry Potter’s world by transforming itself into Diagon Alley, a cobblestoned wizarding and shopping area to celebrate the release of “Harry Potter and the Cursed Child – Parts I & II” at midnight on Sunday, July 31.

UPDATE: Magic of Harry Potter returns for book-release party in Riverside

The three-hour event begins at 10 p.m. Saturday, July 30. Bump into some good and evil characters as you wander into the books’ beloved school, pub, bookstore, shops, dentist’s office, inn and other landmarks of the Potterverse.

One of the soiree’s organizers, Linda Sherman-Nurick, owner of Cellar Door Books at the Riverside shopping center, said she expects more than 200 Potterphiles at the festivities. Through pre-orders, she’s sold 220 copies of the two-part West End stage play written by Jack Thorne and based on a story by Thorne, Potter creator J.K. Rowling and John Tiffany.

The nation’s largest retail bookseller, Barnes & Noble, would not disclose pre-order inventory numbers or sales. However, “Harry Potter and the Cursed Child – Parts I & II” is the company’s most pre-ordered book since “Harry Potter and the Deathly Hallows” in 2007, according to a statement released by the company.

POTTERMANIA EVENTS

Cellar Door Books & the Canyon Crest Towne Centre, at 5225 Canyon Crest Drive in Riverside, will present “Harry Potter and the Cursed Child – Parts I & II” from 10 p.m. Saturday, July 30- 1 a.m. Sunday, July 31 with some special events throughout the celebration.

At 10:30 and 11:30 p.m. there will be a Durmstrang Fire Show with Polynesian Flash Point Fire Dancers performing a Triwizard Spirit Rally routine.

From 10:30 p.m.-midnight you can bid at Hagrid’s Creature Silent Auction, where you may end up bringing home one of the magical creatures discovered by Professor Albus Dumbledore that the half-giant wizard Rubeus Hagrid, has been hiding.

A number of the shops and storefronts have been revamped for the festivities, too. Enter at Hogwarts (Immigration Law Office) in the rear parking lot facing Provident Bank. Find out where you belong as you’re sorted among the four Houses of Hogwarts School of Witchcraft and Wizardry: Hufflepuff, Ravenclaw, Gryffindor or Slytherin.

Flourish & Blotts Bookseller (Cellar Door Books): Sherman-Nurick, as Bellatrix Lestrange, will preside over Harry Potter trivia and activities. Please have your Hogwarts Express ticket and/or pre-order receipt ($32.99 plus tax) and a photo identification ready to pickup your copy of “Cursed Child.” The cash register closes at midnight and pre-orders have sold out for the release night.Pre-order to receive a book next week. Information: 951- 787-7807, cellardoorbookstore.com

The Forbidden Forest (Kiddos 101): Conjure your Patronus, the magical guardian that’s a projection of your most positive feelings.

The Three Boomsticks rustic tavern (Jammin’ Bread): Enjoy butterbeer, sweet and savory treats and tea-leaf readings.

The Leaky Cauldron pub (Marissa’s Italian Deli): Taste sweet treats.

Slug & Jiggers Apothecary, est. 1207 (Migliore Gourmet Foods): Test potions and sweet treats.

Eeylop’s Owl Emporium (Crafty U Too): Paint your own magical pet.

Potions Dungeon (Tangles Salon): Check out the Hairy Potter transformations (think Hagrid and Bellatrix) from enchanted products brewed with Polyjuice Potions, allowing you to metamorphose into your favorite hirsute character.

The Great Hall in Hogwarts’ Castle for feasts in the school (Smokey Canyon BBQ): Try Hogwarts’ mini meals and play Quidditch pong.

Divination Classroom at the school (The Sacred Journey): Enjoy crystal ball readings

Granger’s Dentistry, parents of Hermione Granger (My Dentist & Me): Take pictures with Hermione at a photo booth.

The Hog’s Head Inn and Pub in Hogsmeade (Canyon Crest Winery): Taste specialty wines.

Scrivenshaft’s Quill Shop, writing supply store in Hogsmeade (Allie’s Hallmark): See specialty candies, trinkets and limited edition items. At 11 p.m., a wizard’s chess tournament will happen. Interested in playing? Sign up at Cellar Door Books.

Ollivander’s Wand Practice (American English Institute): Practice spell-casting and get a tattoo.

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MORE EVENTS

• Dress up, make a wand and try your hand at Harry Potter trivia at the Frugal Frigate bookstore in Redlands. 9 p.m. 9 N. 6th St., Redlands. 909-793-0740.

• All Barnes & Nobles stores will host a Countdown to Midnight Magic Party at 8 p.m. Saturday, July 30, leading up to the release of the “Cursed Child” which goes on sale Sunday, July 31 at midnight. The party will feature trivia, costume contests, face-painting, wand-making and a special Muggle Wall where customers can share their favorite memories of Harry Potter.

• At 9 a.m. on Sunday, July 31, customers can return to their local store to discuss the new book and participate in special Harry Potter-themed events and activities. If you haven’t pre-ordered, the company said it expects to meet the demand for copies.

Contact the writer: llucas@pe.com, 951-368-9559