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Horrible Harry #17

Horrible Harry And the Locked Closet

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Horrible Harry has discovered the biggest mystery ever in Room 3B--a locked closet that's been sealed off for years. Miss Mackle, Song Lee, and the rest of the class join Harry in the detective work, but they soon encounter some surprises. Illustrations.

Paperback

First published January 1, 2004

9 people are currently reading
168 people want to read

About the author

Suzy Kline

147 books58 followers
Suzy Kline, nee Weaver, was an elementary school teacher for 25 years and most of her books are based on the experiences she had while teaching. Suzy and Rufus got married and had two daughters named Jennifer and Emily. Now, more than 24 years after writing her first book, Suzy has traveled all over the United States helping children learn how to enjoy reading and writing.

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Community Reviews

5 stars
156 (43%)
4 stars
82 (22%)
3 stars
91 (25%)
2 stars
28 (7%)
1 star
2 (<1%)
Displaying 1 - 24 of 24 reviews
Profile Image for Cayla Solis.
1 review1 follower
September 30, 2025
Jude’s review

It’s the best because it’s my favorite book. When they made a volcano and it exploded was awesome in the book. -Jude
Profile Image for Rebecca.
653 reviews1 follower
July 16, 2008
Cute series! I didn't realize, when I picked these books out, that they have some faith based substance. At one point in the story two of the boys are distraught over their teacher leaving and together they found a quite place to pray. I am so happy to see stories that still hold Christian values and teach them to my son in a way he can relate and I hope will duplicate should he need to some day.
Profile Image for Cheryl.
13.3k reviews486 followers
September 22, 2021
I like the forwards in these books, in which Kline thanks kids for giving her ideas. But sometimes she still, after 16 previous books, draws on personal experience....

Great series, so heartwarming and funny. As I've said, every potential primary teacher should read at least a few of these... they are short & easy! And though they're not amazing and I seldom give them four stars, even the three star ones are recommended for children and parents.
Profile Image for Lauren Raimondi.
46 reviews
January 2, 2014
I definitely think my kids will enjoy reading this book. It's fast paced and has characters that are pretty easy to relate to. The mystery of what is in the locked closet is definitely appealing to a second grader.
Profile Image for Marlee.
2,020 reviews
August 10, 2016
This book was short and easy to read. It kept the interest of my 9 year old and my 6 year old. My rating is based on their enjoyment of it. It is not very engaging for an adult. However, I do love the facts and activity that are at the end of the book.
Profile Image for paige turner ♡.
292 reviews9 followers
July 11, 2019
I gave this Horrible Harry story 5 stars because I'm a sucker for a mystery.

I mean, how could you not be curious about a closet that's been locked for over 40 years? A closet that they find out was called "The General's Closet"?

Profile Image for Diane.
7,294 reviews
June 12, 2017
During a stretch of cabin fever, 3B explores a closet that's been locked for 48 years
Profile Image for Lisa.
1,550 reviews16 followers
March 13, 2018
My 2nd grader and I read this - we thought it was good!
2 reviews1 follower
November 17, 2019
I love this book you should try it out to for all the kids horrible harry in the Locked closet was really fun to read
Profile Image for Savani.
641 reviews36 followers
October 23, 2025
Suzy Kline’s Horrible Harry and the Locked Closet continues her beloved classroom series with warmth, humor, and a touch of mystery. In this seventeenth installment, readers return to Room 3B, where Harry, Doug, and their classmates once again find themselves wrapped up in a school-day adventure filled with curiosity, friendship, and feelings that run deeper than they first appear.

The story centers around a mysterious locked closet in their classroom and a rumor that begins to circulate about their teacher, Miss Mackle. When Harry starts to suspect that Miss Mackle might be leaving or moving away, his imagination and his emotions run wild. It’s both funny and endearing to see Harry’s mind at work as he jumps to conclusions and tries to solve the mystery in his own spirited way. Beneath the humor, Kline captures something very real about how children cope with change and uncertainty, especially when it involves someone they care about deeply.

What stands out most is how Kline portrays Harry’s vulnerability. His worry over Miss Mackle possibly moving away shows just how attached he has become to his teacher, and how even “horrible” Harry has a tender side. The scenes where his emotions peek through add genuine heart to the story and remind readers that growing up means learning how to handle big feelings as much as it means learning math or reading.

Frank Remkiewicz’s familiar black-and-white illustrations once again complement the story perfectly, adding humor and expression to the classroom antics. His artwork captures the warmth of Room 3B and helps bring Harry and his friends to life for young readers.

As always, Suzy Kline strikes a lovely balance between fun and feeling. Horrible Harry and the Locked Closet is a charming reminder that even the most mischievous kids have kind hearts and that sometimes, the scariest mysteries of all are the ones about the people we love possibly leaving.

A delightful, heartfelt addition to the Horrible Harry series, this story shows once again why these books remain a favorite for early readers. It’s cute, funny, and full of heart; perfect for kids who are beginning to see that even classroom troublemakers have soft spots.
This entire review has been hidden because of spoilers.
Profile Image for Clark.
27 reviews1 follower
February 19, 2021
Recently I had to read four children's/young adult books for book reports with my students. Of the four, this one was the most underwhelming. I know I'm not exactly part of the target demographic for it, but I don't think I would have enjoyed it as a child either.
Profile Image for Helen.
3,743 reviews83 followers
July 30, 2024
This book has lots of information about volcanoes, but that's not what the mystery is. It has two: one about the closet and one about his teacher. A happy ending! I found it interesting that the kids prayed twice!
Profile Image for Sydney.
1,115 reviews14 followers
November 15, 2013
when harry finds this door the class tries to open it .
Profile Image for Ash.
137 reviews1 follower
November 23, 2016
The 8YO reader says "Harry can be helpful sometimes too."
Profile Image for Tracey.
520 reviews15 followers
October 14, 2017
I really don't know why Harry is called Horrible Harry as he really is not horrid at all. Harry's class have spent four days in a row inside the classroom during recess, and have already started getting bored with the indoor games that they play with during these times. Some of the games are already missing pieces. Harry uses this time to investigate the locked closet in the classroom and the reason why it has been sealed off for years. What an amazing teacher Harry's class has - as she encourages them to investigate the mystery of the door. A lovely read and a super story.
Displaying 1 - 24 of 24 reviews