Tunnel of Secrets (Hardy Boys Adventures)
Sold by Ergodemedia, an authorized reseller of Authentic New & Used Books with Free US Shipping.
30-day returns by mail · Refunded to original payment method | support@ergodemedia.com
Shipping Information
- Free Standard Shipping — United States only
- Processing Time: 1–3 business days
- Estimated Delivery: 3–5 business days after dispatch via USPS / UPS
- Securely packed to ensure your book arrives in the described condition
- Tracking number sent via email once dispatched
- Taxes calculated at checkout. International shipping not available.
Returns & Refund
Returns accepted within 30 days of delivery. Returns are processed by mail. Refunds are issued to the original payment method within 5–7 business days of receiving the returned item.
Damaged, Defective or Misrepresented Item
Free return shipping by mail · Full refund to original payment method
Wrong Item Received
Free return shipping by mail · Full refund or replacement at your choice
Change of Mind
Return shipping at customer's expense · Book must be in the same condition as received · Refund to original payment method
Safety & Compliance
California Proposition 65 Warning
Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
www.P65Warnings.ca.govBook Condition & Care Notice
Used books are graded and described accurately — condition details are listed on each product page. Books may contain previous owner's handwriting, highlights, or stamps unless stated as new. Store books away from direct sunlight and moisture to preserve their condition.
New books are sealed or unread. Used books are inspected before dispatch.
Product Authenticity & Notice
All books sold by Ergodemedia are 100% authentic, sourced directly from publishers and trusted distributors. Book condition is accurately graded and described. Some books may contain previous owner's markings or inscriptions.
Ergodemedia — Authentic New & Used Books. Free US Shipping. Delivered to Your Door.
Description
When Frank And Joe Set Out To Explore Caves And Tunnels, They Dig Themselves Into Some Dark And Dangerous Trouble In This Hardy Boys Adventure.When A Sinkhole Opens Up And Swallows One Of BayportS Historic Statues, Frank And Joe Suspect Something-Or Someone-Shady At Play. They Jump At The Chance To Investigate; Joe As A Member Of An Urban Exploration Club, And Frank As Photographer For The School Paper. But In The Thick Of Their Search, The Boys Stumble Upon An Entire Underground City ThatS Been Abandoned For Years. Now The City Is Home To A Cultish Band Of Criminals Who Plan To Take Over Bayport. Frank And Joe Are Determined To Shut Down The Crooks, But After Being Barreled Down By A Boulder And Nearly Squashed By A Runaway Train, They Have To Wonder: Are They In Over Their Heads?
Shop The Full Collection