Kate McKinnon book fans now have much to celebrate—her first children’s novel, The Millicent Quibb School of Etiquette for Young Ladies of Mad Science, launched in October 2024, and she recently announced its sequel, Secrets of the Purple Pearl. These works mark a major leap from sketch comedy to middle-grade fiction, showing an entirely new side of McKinnon’s creative life.
Her Debut: Millicent Quibb Takes the Stage
In early 2024, McKinnon formally announced her first novel for young readers. The Kate McKinnon book The Millicent Quibb School of Etiquette for Young Ladies of Mad Science released on October 1, 2024. The story follows three sisters—Gertrude, Eugenia, and Dee-Dee Porch—who feel out of place in their snooty hometown, Antiquarium. After being expelled from every etiquette school, they receive a strange invitation to attend one more—and discover that the headmistress is none other than an eccentric mad scientist with worms in her hair.
That debut novel immediately climbed to bestseller lists, resonating with fans of middle-grade fantasy and those drawn to McKinnon’s quirky humor. Early reviews praised the worldbuilding, the imaginative scenarios, and McKinnon’s playful voice, likening the tone to Lemony Snicket sensibilities.
Sequel Incoming: Secrets of the Purple Pearl
In March 2025, McKinnon announced the sequel to her debut, titled Secrets of the Purple Pearl. The new installment has already opened for pre-orders and is expected to publish in fall 2025. The plot takes place at the mysterious Purple Pearl Hotel, where the Krenetics Research Association searches for a legendary pearl in the depths of Kagloopy Lake.
McKinnon describes the sequel as a continuation of the characters’ journey, challenging them with deeper mysteries and new revelations about their origins. She told People she was inspired by her readers’ enthusiasm and views the series as a long-term adventure.
Why McKinnon Moved into Middle-Grade Fiction
Switching from comedy and acting into children’s literature might seem like a big leap, but for McKinnon it felt natural. She has said she saw parallels between sketch comedy and middle school—the unabashed silliness, the awkwardness, and the overt emotion.
Her childhood love of nature, bug hunts, and imaginative adventures also shaped the kind of story she wanted to write. McKinnon designed Millicent Quibb to inspire young readers to embrace uniqueness, question norms, and find community in unexpected places.
Reception, Impact & Future Prospects
The first Kate McKinnon book earned strong praise and attracted a dedicated buzzy audience. Reviewers noted its clever humor, morally grounded themes, and inventive setting. Librarians and book lovers consider it a strong addition to middle-grade shelves.
With the sequel on the way, McKinnon is also planning a book tour, speaking events, and promotional appearances. The expansion into writing strengthens her multifaceted career—actor, comedian, voice performer, and now author.
What to Expect from the Kate McKinnon Book Series
Here are some things fans and readers can look forward to:
- Deeper exploration of the Porch sisters’ personalities and pasts
- New eccentric characters and settings tied to mad science lore
- A blend of humor, mystery, and emotional stakes
- Continued affirmation of individuality, belonging, and courage
McKinnon has hinted that she wants the series to last beyond two books—and that she wants it to balance wild imagination with heart.
Kate McKinnon book fans have reason to be excited: a successful debut and a promising sequel on the horizon. As she steps into the literary world, McKinnon’s voice continues to shine—funny, kind, and boldly imaginative.
What do you hope to see in Secrets of the Purple Pearl or future volumes? Drop your thoughts below as we await the next chapter.