Book Series · 3 Books

Mermaid Days Books

In order from The Sunken Ship: An Acorn Book to A New Friend.

Mermaid Vera and octo-kid Beaker explore their underwater home through sunken-ship discoveries, monster worries, and the challenge of welcoming a new friend.

Reviewed by the Bookroo Editors Updated August 19, 2026

Reading order

How to Read the Mermaid Days Books

Scholastic numbers the three books, so read them in order to follow Vera and Beaker's friendship. Each volume also contains a self-contained underwater adventure.

Sources: Scholastic Acorn: Mermaid Days order.

For parents

What Parents Should Know

Short sentences, speech bubbles, bright illustrations, and brief chapters are designed for children building independent-reading confidence.

The stories include mild underwater suspense and friendship uncertainty, but problems resolve through curiosity, teamwork, and welcoming others.

Where the story begins

First Book in the Series

Graphic Nov.

Sale price

$2399

Book #1 · Picture Book · Ages 5–7 · 2022

The Sunken Ship: An Acorn Book

By Kyle Lukoff, Kat Uno (Illustrator)

Join mermaid and octo-kid on underwater adventures in Tidal Grove.

64 pages· 741 words· Est. 8 min read-aloud

Hardcover

Summary: In the vibrant town of Tidal Grove, mermaid Vera and her friend Beaker, an octo-kid, embark on whimsical adventures. From exploring mysterious sunken ships to solving peculiar octopus dilemmas, their escapades are filled with humor and charm. Perfect for young readers, these stories promise laughter and discovery beneath the waves. What secrets will they uncover in the deep blue sea?

In reading order

Mermaid Days Series

3 books · Published 2022–2023

#1 in Series

Graphic Nov.

Sale price

$2399

The Sunken Ship: An Acorn Book

Picture Book · Ages 5–7 · 2022

Join mermaid and octo-kid on underwater adventures in Tidal Grove.

#2 in Series

Graphic Nov.

Sale price

$2399

The Sea Monster

Picture Book · Ages 5–7 · 2022

Dive into ocean adventures with a mermaid and octo-kid exploring tide pools and meeting sea monsters.

#3 in Series

Graphic Nov.

Sale price

$2399

A New Friend

Picture Book · Ages 4–6 · 2023

Join a mermaid and octo-kid as they befriend a powerful mantis shrimp in underwater adventures.

Good to know

Common Questions

How many books are in the Mermaid Days series?

There are 3 books in the Mermaid Days series. It began with The Sunken Ship: An Acorn Book in 2022, and the newest book, A New Friend, was published in 2023.