Books like Under the Serpent Sea by Tony Abbott

A boy with broken memory wakes in a stone‑walled maze, where he meets other children who call it the Glade. When the first girl arrives, secrets about survival, cooperation, and the maze’s mystery begin to surface.

Four orphaned girls in Carthya are chosen for a deadly contest to impersonate the king’s lost son, a scheme that could avert civil war.

In a world split by blood, a lowly Red named Mare Barrow discovers a hidden power that threatens the ruling Silver elite, forcing her into the palace as a fake princess while she secretly fuels a rebellion.

Three children uncover a glittering rainbow staircase in a basement, transporting them into the adventurous world of Droon where magic and mystery await.

Eric and his friends must fly Queen Zara’s chariot across the sky of Droon to rescue a wizard trapped on its moon.

From the Water... For years, Margred has gone without the touch of another. Now, her need has driven her beyond her own world. For she is a selkie - a legendary being of the sea. able to shape into seductive human form. Finally, she has found the one she wants.... From the Land... A burned-out version of the of the big-city streets, Caleb Hunter was only too happy to take the job of police chief on the peaceful Maine island of World's End. Nothing ever happens in this tiny community surrounded by the sea - until he meets a woman who's everything he's ever dreamed of. And more... To Each Other... Their passion is undeniable. Irresistible. But when a murderer begins targeting women in World's End, Caleb must face the terrible possibility that the killings are somehow connected to the mysterious Margred - and that the power of their love may change the fate of humanity.

Mildred Hubble, apprentice witch notorious for mishaps, brings her cat Tabby onto a school trip to Gloomy Cove, where a fortune-finding adventure unfolds.

Eric, Julie, Neal, and Princess Keeah are shipwrecked on a witch‑owned island and must escape before Lord Sparr arrives.

Sparr has gathered all three of his powers—Red Eye of Dawn, Coiled Viper, and Golden Wasp—making him the most powerful being in Droon. His plan is to use the Isle of Mists to unleash a magic that could seize the entire world of Droon.

Three young adventurers race to locate the legendary Dragon Ship before an evil princess can claim it.

When the powerful wand of Urik disappears, Galen and his friends must track it through Droon, following the Moon Scroll that can transport readers back in time.

Mildred Hubble, the notorious student at Miss Cackle's Academy, must face new challenges when her beloved cat Tabby accompanies them on a seaside school trip.

Neal, Julie, and Keeah journey through the bottled city of Ut to find the fabled Moon Medallion, only to discover it has been shattered into four pieces, turning their quest into a perilous race against time.

After her best friend Anna drowns, Evie feels isolated in a small fishing town. When a girl who looks like Anna appears offshore, Evie wonders if Anna survived and if her hidden magic can help.

After his mother dies, 12‑year‑old David escapes into the stories that once comforted him, only for myth and war to collide in a world where a Crooked Man and a faded king rule over wolves and hidden secrets.