The Secret Mermaid Series

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(6 reviews)

Sue Mongredien’s Secret Mermaid series is a great pick for younger readers, especially those around 7 to 10 years old who are ready to dive into longer stories. The books follow Ellie, a young mermaid who has to keep her magical identity secret while juggling adventures under the sea and life on land.

What really works about these stories is how they combine everyday childhood experiences — like making friends and solving problems — with a bit of magic and excitement. The writing is straightforward and easy to follow, which helps children build confidence as they move into chapter books.

Each story brings a new adventure, with themes of friendship, bravery, and kindness running through. The series also sparks curiosity about the ocean and nature, without being heavy-handed.

These books are ideal for reading aloud or for kids who want to read on their own but still enjoy a gentle, engaging story.

Book 1
Book 1

The Enchanted Shell

Far out in the ocean live the Shell-Keeper mermaids. While the rest of the world sleeps, one little girl joins them for ... MoreThe Enchanted Shell

(1 review) 4 1
Review
Book 2
Book 2

Seaside Adventure

Far out in the ocean live the Shell-Keeper mermaids. While the rest of the world sleeps, one little girl joins them for ... MoreSeaside Adventure

(1 review) 5 1
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Book 3
Book 3

Underwater Magic

Far out in the ocean live the Shell-Keeper mermaids. While the rest of the world sleeps, one little girl joins them for ... MoreUnderwater Magic

(2 reviews) 5 2
Review
Book 4
Book 4

Reef Rescue

Far out in the ocean live the Shell-Keeper mermaids. While the rest of the world sleeps, one little girl joins them for ... MoreReef Rescue

(1 review) 5 1
Review
Book 5
Book 5

Deep Trouble

Far out in the ocean live the Shell-Keeper mermaids. While the rest of the world sleeps, one little girl joins them for ... MoreDeep Trouble

(0 reviews)
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Book 6
Book 6

Return of the Dark Queen

Far out in the ocean live the Shell-Keeper mermaids. While the rest of the world sleeps, one little girl joins them for ... MoreReturn of the Dark Queen

(1 review) 5 1
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Book 7
Book 7

Seahorse SOS

There's trouble in the Undersea Kingdom. All the seahorses have vanished and the Animal-Keeper mermaids are desperate to... MoreSeahorse SOS

(0 reviews)
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Book 8
Book 8

Dolphin Danger

Bad magic is at work in the Undersea Kingdom - the dolphins are missing, and nobody knows where to find them. When Molly... MoreDolphin Danger

(0 reviews)
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Book 9
Book 9

Penguin Peril

The penguins have mysteriously disappeared from the icy seas and the mermaids are worried - where can they be? Molly and... MorePenguin Peril

(0 reviews)
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Book 10
Book 10

Turtle Trouble

Molly and her mermaid friend, Shanti, are on their way to a tropical island to rescue the turtles trapped there. But dan... MoreTurtle Trouble

(0 reviews)
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Book 11
Book 11

Whale Adventure

'No use fooling yourself. The sharks got him.'Hal and Roger Hunt are hoping to have a whale of a time when they agree to... MoreWhale Adventure

(0 reviews)
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Book 12
Book 12

The Dark Queen's Revenge

Disaster! The mermaid palace is being attacked by the Dark Queen who wants to rule the oceans. Can brave Molly find a wa... MoreThe Dark Queen's Revenge

(0 reviews)
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  • Underwater Magic

    Underwater Magic

    My 8 year old loves these stories. This is the third book in the series and saw Molly once again transform by magic into a mermaid during bedtime and ...

  • Return of the Dark Queen

    Return of the Dark Queen

    This is a wonderful little book. Great for those early confident readers. My girl of 7 didn't take long to read it at all. She thought the book was gr...

  • Reef Rescue

    Reef Rescue

    My girl of 7 years old read this book. She really enjoyed it and read it within a day or two. It is a about Molly who changes into a Mermaid and tries...