LAKE PLACID – It was like 2007 all over again as 129 people came to the Bookstore Plus at midnight Sunday to be the first to buy a new installment in the saga of wizard Harry Potter, a play called “Harry Potter and the Cursed Child, Parts One and Two.”

Some had dressed up as witches and wizards. Christina Ortiz ended up winning a costume contest and earning herself a free copy of the book, which cost $30.

Can-Am Rugby Tournament players and other people out on the town wondered aloud what was going on as they walked by, but they figured it out pretty quickly. All seven previous Potter books are commonly listed among the top 20 best-selling books of all time. The last one came out nine years ago and was thought to be the end of the story, but not anymore.

The line of customers stretched way down the block from the bookstore. As they waited, a employee walked up and down asking trivia questions to test the eager readers’ knowledge of author J.K. Rowling’s “wizarding world.”

“Which Hogwarts professor used to be a Death Eater?” he asked Tasman Kanze of Bloomingdale, who will go into sixth grade this fall. “A) Professor Flitwick, b) Professor Snape, or c) Professor McGonagall?”

“It’s Professor Snape,” Tasman answered.

“Well done,” the man answered and gave her a ticket, good for a prize of her choice when she got inside.

That was actually one of the easier questions, but these kids — and adults — knew their Potter-lore.

Right behind the Kanze family was an adult couple from Saranac Lake, Todd Gutman and Trina-Marie Baird, wearing matching “Quidditch Gryffindor” T-shirts. He was holding a broom; players ride flying brooms in the wizard sport of quidditch. They had not seen any of the scraps of the new plot available in the media; they were ready to be totally surprised.

Potter is their age in “Cursed Child,” an overworked civil servant whose three children are now students at Hogwarts School of Witchcraft and Wizardry.

“He’s three days older than I am,” Baird said. “July 31st, 1980.” Yes, the play was released on the fictional hero’s 36th birthday — which is also Rowling’s 51st.

Baird started reading the Potter books in 2000, when there were four, published one a year since 1997. She special-ordered the next three. She said this is the first midnight release party when she hasn’t been working at a bookstore selling the new Potter book.

Some vacationers showed up, too, like young sisters Eva and Ella Engel of Los Angeles. They’re still working their way through the seven novels, but the “Cursed Child” will be waiting for them on their bookshelf at home.

Let inside the store at midnight, customers lined up to buy the book, but they also gathered around tables where they sampled butterbeer, a non-alcoholic butterscotch brew from the books, played “Pin the scar on Harry” and collected prizes for their trivia answers.

Sarah Galvin, co-owner of the bookstore, was very pregnant in 2007 when the bookstore held a midnight release party for “Harry Potter and the Deathly Hallows.” It was actually her due date, and she recalled telling her daughter, in utero, that she’d have to wait for another day to be born. Dutifully, Norah Galvin did. Now 9, Norah and two friends ran the prize table at Sunday’s event, dressed as characters from the books.

Billy Waldy, who graduated from Lake Placid High School this June, was Norah’s age when he attended that 2007 release party, and he said he was excited to read the new book he was waiting in line to buy.

“Maybe I’ll just have to skip work tomorrow just to read through it all,” he said.

“Cursed Child” is much shorter than previous Potter volumes. An avid reader can finish the 308-page play in three hours, whereas the last four novels ranged between 652 and 870 pages.

It’s also for sale at Moose Maple Books & More in Saranac Lake, which did not have a midnight release party.