--- product_id: 514439036 title: "Hardy Boys Books 21-30 The Hardy Boys Mystery Collection Box Set" price: "$177.53" currency: USD in_stock: true reviews_count: 5 url: https://www.desertcart.us/products/514439036-hardy-boys-books-21-30-the-hardy-boys-mystery-collection store_origin: US region: United States of America --- # collector’s slipcase included 10 hardcover mysteries perfect for aspiring detectives Hardy Boys Books 21-30 The Hardy Boys Mystery Collection Box Set **Price:** $177.53 **Availability:** ✅ In Stock ## Summary > 🕵️‍♂️ Unlock the mystery, own the legacy — the Hardy Boys await your next adventure! ## Quick Answers - **What is this?** Hardy Boys Books 21-30 The Hardy Boys Mystery Collection Box Set - **How much does it cost?** $177.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/514439036-hardy-boys-books-21-30-the-hardy-boys-mystery-collection) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Timeless Appeal:** Beloved stories that have captivated generations, now ready to inspire the next wave of readers. - • **Collector’s Pride:** Beautifully designed slipcase keeps your collection pristine and stylish on any bookshelf. - • **Complete Mystery Set:** Dive into books 21-30 of the iconic Hardy Boys series, all in one sleek collection. - • **Gift-Ready Packaging:** An ideal present for fans, families, and educators looking to spark imagination and curiosity. - • **Educational & Engaging:** Perfect for young readers (ages 9-12) to boost vocabulary and critical thinking through thrilling mysteries. ## Overview This exclusive Hardy Boys Mystery Collection Box Set features books 21-30 in hardcover format, housed in a specially designed slipcase. Perfect for readers aged 9-12, it offers a timeless series of thrilling detective stories that have entertained and educated generations. With a 4.9-star rating from 370 reviews, this collectible set is both a nostalgic treasure and a smart gift choice for aspiring young detectives and longtime fans alike. ## Description Add mystery to your bookshelf with this exclusive Hardy Boys Collection! This set includes books 21-30 in the series. Perfect gift to introduce new readers to the series, as well as fans looking for a beautiful collectible of these beloved classics. The Hardy Boys Collection is the perfect gift for aspiring detectives, or long time fans of the series. This collectible set contains the third 10 mysteries in the series presented in a specially designed slipcase. Not only is it the perfect way to keep all the books together, it also looks great on the bookshelf! The Books Included in This Set Are: 21. The Clue of the Broken Blade 22. The Flickering Torch Mystery 23. The Melted Coins 24. The Short-Wave Mystery 25. The Secret Panel 26. The Phantom Freighter 27. The Secret of Skull Mountain 28. The Sign of the Crooked Arrow 29. The Secret of the Lost Tunnel 30. The Wailing Siren Mystery Recommended Ages: 9 - 12 Format: Hardcover Titles Review: quality binding - we have bought the series from book 1-30 now. we have always been happy with the stories. My children read the books and now my grandchildren are reading them. Very happy with the stories. Review: Great Fun for young and old readers alike. - I was so excited to add these books to my learning library as I am teaching kids age 3 to 16 English in Thailand. I read these books when I was in Primary School and always enjoyed the Hardy Boys/Nancy Drew mysteries series. They spark the imagination of many of my students now and give them an easily understandable approach to furthering their English skills and expanding their vocabulary. Great discussions follow after each reading. A great set of books for young readers and old teachers alike! ## Features - Add mystery to your bookshelf with this exclusive Hardy Boys Collection! This set includes books 21-30 in the series. Perfect gift to introduce new readers to the series, as well as fans looking for a beautiful collectible of these beloved classics. - The Hardy Boys Collection is the perfect gift for aspiring detectives, or long time fans of the series. - This collectible set contains the third 10 mysteries in the series presented in a specially designed slipcase. Not only is it the perfect way to keep all the books together, it also looks great on the bookshelf! - 21. The Clue of the Broken Blade 22. The Flickering Torch Mystery 23. The Melted Coins 24. The Short-Wave Mystery 25. The Secret Panel 26. The Phantom Freighter 27. The Secret of Skull Mountain 28. The Sign of the Crooked Arrow 29. The Secret of the Lost Tunnel 30. The Wailing Siren Mystery ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | 1,307,127 in Books ( See Top 100 in Books ) | | Customer Reviews | 4.9 out of 5 stars 370 Reviews | ## Images ![Hardy Boys Books 21-30 The Hardy Boys Mystery Collection Box Set - Image 1](https://m.media-amazon.com/images/I/91XlWkXTsHL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ quality binding *by Q***2 on 20 April 2023* we have bought the series from book 1-30 now. we have always been happy with the stories. My children read the books and now my grandchildren are reading them. Very happy with the stories. ### ⭐⭐⭐⭐⭐ Great Fun for young and old readers alike. *by M***X on 17 July 2024* I was so excited to add these books to my learning library as I am teaching kids age 3 to 16 English in Thailand. I read these books when I was in Primary School and always enjoyed the Hardy Boys/Nancy Drew mysteries series. They spark the imagination of many of my students now and give them an easily understandable approach to furthering their English skills and expanding their vocabulary. Great discussions follow after each reading. A great set of books for young readers and old teachers alike! ### ⭐⭐⭐⭐⭐ Great *by T***K on 13 October 2025* Good service ## Frequently Bought Together - Hardy Boys Books 21-30 The Hardy Boys Mystery Collection Box Set - Hardy Boys Books 11-20 The Hardy Boys Mystery Collection Box Set - Hardy Boys Set - Books 31-40 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/514439036-hardy-boys-books-21-30-the-hardy-boys-mystery-collection](https://www.desertcart.us/products/514439036-hardy-boys-books-21-30-the-hardy-boys-mystery-collection) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-12*