
Title: The Poisoned King
Series: Impossible Creatures, #2
Author: Katherine Rundell
Narrator: Samuel West
Publisher: Knopf Books for Young Readers
Publication date: September 11, 2025
Print length: 304 pages
Audio length: 7 hours 6 minutes
Genre: Middle grade fantasy
Source: Purchased
Rating:
Return to the magic of the Archipelago in the dazzling sequel to the runaway, #1 New York Times bestseller Impossible Creatures, hailed as “an instant classic” (Katherine Applegate, Newbery Medal Winner for The One and Only Ivan)!
Christopher Forrester woke to find a dragon chewing on his face—and his heart leapt for joy! He’d been dreaming of going back to the Archipelago, the secret cluster of islands where all the creatures of myth still live, and here was his summons.
But there is a poison spreading in the Archipelago. Rooting it out will involve a daring rescue mission on the back of a sphinx, a stealthy entrance to a dragon’s lair, and a death-defying plan to save a prisoner held in the heart of a castle. At the center of this storm is Anya: a small girl with a flock of birds at her side, a new-hatched chick in her pocket, and a ravenous hunger for justice.
Katherine Rundell’s second thrilling installment in the Impossible Creatures series involves castles, dragons, and revenge—the things of which great stories are made. The splendors within are brought to life with more than fifty illustrations, including a map and a bestiary of magical creatures.
As The Poisoned King opens, a teen-aged boy named Christopher is woken by a dragon chewing on his nose. Which is less dangerous than it sounds — this is a Jaculus dragon, a creature the size of a sparrow, but with an outsized sense of its own importance. Jacques — the dragon — has come with a summons: Christopher is required to come with him to the Archipelago immediately. Someone is poisoning the great dragons, and there’s no time to lose.
What is the Archipelago? It’s a magical world comprising many large and small islands, inhabited by an astonishing variety of humans and creatures, hidden from our own world and accessible only through certain connecting locations known as waybetweens. Waybetweens are protected and kept safe by Guardians, of which Christopher’s grandfather is one — as Christopher learned the previous summer while visiting him at his remote home in Scotland, which led to Christopher’s grand, dramatic adventures in Impossible Creatures.
Christopher is a good, brave person who would never ignore a call for help, so he returns to the Archipelago to discover that things are even worse than he feared. Upon arrival, he’s met by a sphinx, who instructs him that he has a detour to make before proceeding to the dragons: A princess named Anya is in desperate need of rescue, and his mission and her plight are bound together.
And so we meet Anya Argen, granddaughter of the king of the island of Dousha. Anya’s father has raised her far from the castle, free to explore the forest they both love and spend time with the creatures who live there. When the King insists that she learn to behave like a proper princess, they’re forced to return to the castle, much to Anya’s dismay. As the story opens, the King is murdered, and her father — heir to the throne — is framed for the crime, leaving the way clear for his younger brother to act as Regent until Anya comes of age to rule herself. But her uncle Claude is not a patient man, and Anya finds her own life threatened.
As Christopher and Anya’s journeys connect, they join forces to unravel the mystery of what’s happened to the dragons while also laying plans to keep Anya alive and rescue her father, now imprisoned and sentenced to death for the murder of the King. Their quest takes them to new and old friends, and brings them into contact with even more fascinating magical creatures, while also giving them time to develop trust, friendship, and loyalty to one another.
The Poisoned King is a terrific second book in this captivating middle grade series. It has the surprises and delights of encountering magical worlds and beings, journeying through lands with rules and customs so different from our own, and seeing two young humans struggle to fix situations that have gone very badly.
Christopher is as lovely as ever, and Anya is a compelling addition to this fictional world. She’s complex and spiky; her desperate need to save her father is paired with a burning thirst for vengeance, and we see her grapple with the idea of revenge and what its impact might be on the type of person she is and wants to be.
The Poisoned King isn’t quite as glorious as Impossible Creatures — but that’s to be expected in the 2nd book of a series. Impossible Creatures introduced us to a new magical world and its wonders; The Poisoned King tells another story in that world, but lacks just a bit of the awe that comes with a world-building introduction. That said, The Poisoned King is very good, and is a worthy successor to such a stellar first book.
As with Impossible Creatures, I listened to the audiobook, narrated by actor Samuel West (currently starring in All Creatures Great and Small as Siegfried Farnon). He is an amazing voice actor, with delightful voices for Christopher, Anya, and all the various creatures, from tiny dragon Jacques to a deadly manticore and more. I did have a bit of trouble understanding one or two non-human characters due to the pitch of their voices, but that was only for a fraction of the audiobook experience, and didn’t detract from the overall enjoyment at all.
Repeating my reading note from Impossible Creatures: While I loved the audiobook experience, I strongly encourage anyone going that route to also follow along with a print edition. The book is filled with beautiful black and white illustrations by artist Ashley Mackenzie that add so much to the story. A bestiary at the end of the book gives more in-depth explanations of the various creatures in the book, from Batrachomyomachian Mouse to Winged Unicorn, accompanied by illustrations for each. The visual delights of this book should not be missed!
I loved returning to the world of Impossible Creatures, and highly recommend The Poisoned King (but do start with the first book!). A third book, The Neverfear, is scheduled for publication in fall 2026, and I absolutely plan to read it.
Purchase links: Amazon – Audible audiobook – Bookshop.org – Libro.fm
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