Book Series · 5 Books

Sinister Summer Books

In order from Wretched Waterpark to Haunted Holiday.

The Sinister Summer series is a set of 5 chapter books by Kiersten White, published between 2022 and 2024. Written for ages 8–12, most books run about 270 pages.

Where the story begins

First Book in the Series

Sale price

$1597

Book #1 · Chapter Book · Ages 8–12 · 2022

Wretched Waterpark

By Kiersten White

Twins face eerie mysteries at a bizarre waterpark. Can they uncover the truth before it's too late?

256 pages· 40,274 words· Est. 5.5 hour read

$16.99Save 6%

Hardcover

Summary: Theo and Alexander Sinister-Winterbottom are stuck with their peculiar Aunt Saffronia for the summer. When they visit the eerie Fathoms of Fun Waterpark, they encounter vanishing guests, creepy staff, and a mysterious figure atop the slide tower. As strange goo seeps into the wave pool, the twins must unravel the park's secrets. Will they solve the mystery, or are they in over their heads?

The complete set

Sinister Summer Series

5 books · Published 2022–2024

Series

Sale price

$1597

Wretched Waterpark

Chapter Book · Ages 8–12 · 2022

Twins face eerie mysteries at a bizarre waterpark. Can they uncover the truth before it's too late?

Series

Sale price

$1799

Vampiric Vacation

Chapter Book · Ages 8–12 · 2022

Twins uncover dark secrets at a mysterious spa. Can they solve the mystery before it's too late?

Series

Sale price

$1697

Camp Creepy

Chapter Book · Ages 8–12 · 2023

A summer camp's normal facade hides a strange mystery. Can the kids uncover the truth?

Series

Sale price

$1697

Menacing Manor

Chapter Book · Ages 8–12 · 2023

Twins face lurking dangers and hidden truths at a mysterious science camp.

Series

Sale price

$1697

Haunted Holiday

Chapter Book · Ages 8–12 · 2024

Twins face spectral traps and a mysterious nemesis to uncover family secrets.

Good to know

Common Questions

How many books are in the Sinister Summer series?

There are 5 books in the Sinister Summer series. It began with Wretched Waterpark in 2022, and the newest book, Haunted Holiday, was published in 2024.