Skip content
Get two free audiobooks AND support local bookstores Make the switch
A Treacherous Tide by Franklin W. Dixon
  Send as gift   Add to Wish List

Almost ready!

In order to save audiobooks to your Wish List you must be signed in to your account.

      Log in       Create account
Phone showing make the switch message

Limited-time offer

Get two free audiobooks when you make the switch!

Now’s a great time to shop indie. When you start a new membership supporting local bookstores with promo code SWITCH, we’ll give you two bonus audiobook credits at sign-up.

Make the switch
Libro.fm app with gift bow

Gift audiobook credit bundles

You pick the number of credits, your recipient picks the audiobooks, and your local bookstore is supported by your purchase.

Start gifting

A Treacherous Tide

$20.99

Get for $14.99 with membership
Narrator Tim Gregory

This audiobook uses AI narration.

We’re taking steps to make sure AI narration is transparent.

Learn more
Length 3 hours 57 minutes
Language English
  Send as gift   Add to Wish List

Almost ready!

In order to save audiobooks to your Wish List you must be signed in to your account.

      Log in       Create account

Brother detectives Frank and Joe dive deep into the Florida Keys to find a missing person in the twenty-first book in the thrilling Hardy Boys Adventures series.

Frank and Joe Hardy have been invited to take part in a conservation mission by a marine biologist at the Bayport Aquarium. The boys get to go on an all-expenses paid trip to the lush and beautiful Florida Keys to help save sharks!

But the trip’s purpose is suddenly sidelined when a paddle boarder goes missing and rumors start that the disappearance is the result of a shark attack. After spending so much time learning about the local shark population, the Hardy Boys aren’t buying the story.

It will take all of Frank and Joe’s recently acquired knowledge about sharks and their habitat to solve this case. Will they be able to discover what’s really going on before it’s too late?

Franklin W. Dixon is the author of the ever-popular Hardy Boys books.

Phone showing make the switch message

Limited-time offer

Get two free audiobooks when you make the switch!

Now’s a great time to shop indie. When you start a new membership supporting local bookstores with promo code SWITCH, we’ll give you two bonus audiobook credits at sign-up.

Make the switch
Libro.fm app with gift bow

Gift audiobook credit bundles

You pick the number of credits, your recipient picks the audiobooks, and your local bookstore is supported by your purchase.

Start gifting
Get two free audiobooks AND support local bookstores Make the switch