Hardcover sales of Diary of a Wimpy Kid: Cabin Fever, the sixth book in Jeff Kinney’s blockbuster series, topped 1 million copies in its first week on sale, publisher Abrams reported. The book was released November 15 and sales were 25% higher than sales of last November’s Wimpy Kid title, The Ugly Truth.

“Sales for Diary of a Wimpy Kid: Cabin Fever in the first week have exceeded all our expectations. We’re thrilled that the new book has debuted so strongly,” said Abrams CEO Michael Jacobs in a statement. “Still, there is lots more excitement to come with Thanksgiving and the holiday shopping season upon us.” Abrams released Cabin Fever with a six-million-copy first printing.

The strong start of Cabin Fever marks the second title for younger readers to set a blistering sales pace. On its first day on sale, November 8, Christopher Paolini’s Inheritance sold a total of 489,500 copies for Random House, with over 400,000 of those sales the hardcover edition.