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The Boxcar Children Great Adventure #5

The Khipu and the Final Key (Volume 5)

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In this all-new very special miniseries, the Aldens have been recruited by a secret society to return lost artifacts and treasures to their rightful locations all around the world! The final leg of the Aldens' journey brings them to South America and to the Salt Flats in northern Argentina. But when they hit a dead end, they realize someone has tricked them in order to delay their plans! Returning to Buenos Aires, the Aldens connect with the Silvertons and are able to get back on track. But it is clear their rivals are closer than ever. The Aldens' final artifact is their most delicate yet a rare orange orchid they must return to Machu Picchu in Peru. With the stakes higher than ever, the Aldens make a shocking discovery about the Silvertons and the Argents. Will the Boxcar Children be able to use what they've learned to return the final Reddimus artifact intact?"

Audio CD

First published October 1, 2017

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Dee Garretson

28 books86 followers

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5 stars
92 (50%)
4 stars
52 (28%)
3 stars
32 (17%)
2 stars
4 (2%)
1 star
1 (<1%)
Displaying 1 - 20 of 20 reviews
Profile Image for Lara Kasparian.
103 reviews
August 27, 2025
The final book in this series and the fifth book in my book club with my nephew. Seriously the most wholesome educational series ever. To the point that it cracked me up. I love that he loves them so much.
Profile Image for Cadee.
451 reviews8 followers
March 27, 2023
"I like the book because they finally got the robbers to decide on what's right instead of stealing. In the book the children have to go through a bunch of obstacles including a dangerous run throughout salt flats." -Cadee, age 10
152 reviews
January 20, 2024
The Aldens are on their last adventure for the Reddimus Society and this is the most fragile artifact yet! They find out one of their pilots is a spy! Will they be able to return the artifact without it being stolen?
Profile Image for Cherish Brown.
1,388 reviews15 followers
December 27, 2024
(5☆ Would recommend & would read again)
I loved the Boxcar Children books as a kid. I really enjoyed reading this book & I like how it is a part of a mini series. The storyline is great & it has great a great sense of adventure & suspense. Would recommend.
Profile Image for V. Arrow.
Author 8 books64 followers
February 1, 2025
What a schmaltzy ending. I knew it would have to be, but I'm still kind of bummed about it. Investing in five books with someone as a villain only to have them magically go good in one conversation is... ugh.
1,496 reviews13 followers
June 1, 2018
I love these 5 books.In the end I love how they help Anna,and the friends meet again. You must read these in order.
753 reviews5 followers
August 7, 2018
Excellent ending to this mini series
348 reviews
September 14, 2018
This tied up nicely. I loved the twist ending that Anna was actually related to Trudy and Tricia.
This entire review has been hidden because of spoilers.
Profile Image for B..
33 reviews
April 21, 2020
The kids really liked this 5-book series where they travel around the world to return different items that have been stolen.
2,959 reviews
August 4, 2021
Typical Boxcar children adventure. Happy ending, reformed villains because of the goodness of the children and how they treat everyone.
This entire review has been hidden because of spoilers.
Profile Image for Linnae Rondeau.
77 reviews1 follower
February 5, 2022
Great end to the series! Highly recommend! Wonderful to read along with your children.
Profile Image for Tara.
277 reviews
October 12, 2024
I remember the Boxcar Children books from my childhood. I thought it would be nice to revisit. I didn't realize they had been updated...would have preferred the original.
274 reviews
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October 31, 2025
Albert Whitman. rather than Random house.
This entire review has been hidden because of spoilers.
Profile Image for Katy Lovejoy.
12.7k reviews10 followers
June 23, 2026
These four kids were an integral part of my childhood
Profile Image for Tarissa.
1,622 reviews83 followers
August 28, 2019
The great adventure draws to a close as the Boxcar Children finish the race to deposit all seven of their artifacts around the globe. While thwarting thieves and spies, to boot!

These kids show ingenuity, creative thinking, and good puzzle-solving skills. Excellent role models for young kids.

COYER (Read the last book in a series): 4
Displaying 1 - 20 of 20 reviews