*Once a Castle by Sarah Arthur

Readers return to Sarah Arthur’s fantasy world with a whole new adventure and cast of characters in Once a Castle.

*Once a Castle by Sarah Arthur. WaterBrook, 2025. 416 pages.

• Reading Level: Teens, ages 12-15
• Recommended For: Ages 12 and up

A castle has appeared in a valley near Carrick Hall. This arrival draws the younger Addison siblings into a fast-paced adventure along with two new characters: Arash, the Rastegar’s grandson, and Zahra, a young weaver from Ternival. Evil is afoot, portals are opening between Ternival & Tellus (earth), and most of the adults seem oblivious. Will the Addisons and their allies be able to stop the wicked enchantress in the castle before it is too late?

Arthur creates a fast-paced adventure with lots of characters and plot elements. While the chapters switch between characters and worlds, her vivid storytelling will keep readers engaged. Unlike Once a Queen which took place almost exclusively on earth, this is definitely a fantasy adventure, reminiscent of E. Nesbit.

The broad cast of characters can be a lot to keep track of, especially since Arthur devotes time to giving each emotions and motivations. At one pivotal moment, readers will probably find themselves more than frustrated with the decisions of one young character, but Arthur draws forgiveness and learning from this character’s folly. While the novel could function as a standalone, a teaser at the end promises more adventures to come. A well-done, thoughtful fantasy with strong faith elements and themes of courage, bravery, and faithfulness.

Considerations:

• Violence: Some fantasy violence and racial discrimination in both Terrival and Tellus, but this is suitable for its intended audience; sensitive younger readers might find it a little bit too much.

Bottom Line: Great for upper middle-grade and young teen readers who gravitate toward sibling adventures and love the idea of exploring fantasy worlds.

*indicates a starred review (the best of the best in its field)

Recommended Reading at Redeemed Reader

• Reviews: Of course, we recommend Once a Queen by Sarah Arthur (also a starred review!)
• Review: For slightly younger readers, here’s a whimsical tale within a tale, two royal children discover that their castle (and their own mother!) have a very interesting past: A Dragon Used to Live Here.
• Reviews: For those not familiar with Nesbit’s work (referenced above), try The House of Arden or The Treasure Seekers.

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