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Tree House Mystery

by Gertrude Chandler Warner

A hidden window next door

Regular price $11.32 USD
Regular price $18.87 USD Sale price $11.32 USD
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AlbakiReads Editorial

A hidden window next door

When a family moves in next door, the Alden siblings set out to get acquainted by building a tree house with their new neighbors. Their project leads to an unexpected puzzle: a window in the old house that no one seems to know about. The mystery gives the story a clear link between making new friends and investigating a curious detail in the neighborhood. Presented as an illustrated chapter book in the Boxcar Children series, it centers on the siblings’ search for answers about the house’s hidden feature.

Good fit for readers who enjoy

  • Children ages 9–12 looking for a chapter book mystery.
  • Readers interested in sibling adventures and making new friends.
  • Fans of stories about investigating secrets in a neighborhood setting.

Themes

Mystery and investigationSibling adventureFriendshipCuriosity

Based on publisher information and book metadata.

Book overview

Four brave siblings were searching for a home - and found a life of adventure! Join the Boxcar Children as they investigate the mystery of a secret window in this illustrated chapter book series beloved by generations of readers.

A family moves into the house next door! The Boxcar Children decide to make friends with their new neighbors by building a tree house with them. In the process, they notice a window in their neighbor's house that nobody knows about. Does the old home have a secret?

What started as a single story about the Alden Children has delighted readers for generations and sold more than 80 million books worldwide. Featuring timeless adventures, mystery, and suspense, The Boxcar Children(R) series continues to inspire children to learn, question, imagine, and grow.
Shipping & returnsShipping options, delivery timing, and our return policy.

In-stock items normally dispatch within 1–2 business days. The ZIP-code estimator on this page is informational only; the final shipping method, price, and availability are confirmed at checkout for your full order.

For the initial delivery estimate we use these transit windows after dispatch: Standard 5–8 business days, Expedited 2–4 business days, and Priority 1–2 business days. Holiday delays are not included.

Eligible items can be returned within 30 days in accordance with our return policy.

Customer reviews

M
AlbakiReads
Malaika Taylor

I highly recommend to for anyone looking for inner clarity

T
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Thomas DiMassa

Great service and fast service

Great shopping experience! The book arrived quickly, was well packaged, and matched the description perfectly. I would definitely shop with you again

O
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Olivia

Smooth.