Start with Kaz and Claire's first case
Begin with The Haunted Library to see how Kaz and Claire meet and form the detective partnership used in every later mystery.
Book Series · 10 Books
The Haunted Library Books
In order from The Haunted Library to The Underground Ghosts.
Ten gently spooky chapter-book mysteries pair ghost boy Kaz with human detective Claire as they investigate hauntings and search for Kaz's missing family.
Reviewed by the Bookroo Editors Updated
Reading order
How to Read The Haunted Library Books
Read the ten books in numbered order, beginning with The Haunted Library. Each case can be enjoyed as a small mystery, but Kaz's search for his separated ghost family develops from book to book.
The Underground Ghosts is the tenth and final book, so this page contains the complete published series.
Sources: Penguin Random House official Haunted Library order.
For parents
What Parents Should Know
Penguin Random House describes this as a “not-too-scary” mystery series. The stories include ghosts, dark rooms, strange noises, and apparent hauntings, but the cases are reassuring and often have friendly explanations.
Kaz is separated from his family when his old haunt is destroyed, which may feel sad or suspenseful for sensitive readers. Friendship, teamwork, and the hope of reunion keep the tone comforting.
Where to start
Where Should My Child Start?
Where the story begins
First Book in the Series
Sale price
$759
Book #1 · Chapter Book · Ages 6–8 · 2014
The Haunted Library
By Dori Hillestad Butler, Aurore Damant (Illustrator)
A young ghost named Kaz is swept away from his family's home by a strong wind and must navigate a new and unfamiliar world, including a mysterious library where he meets a girl who can see and hear him.
128 pages· 11,620 words· Est. 2 hour read
$7.99Save 5%
Paperback
Summary: Ghost boy Kaz, separated from his family, meets Claire, a girl who can see ghosts. Together, they embark on a quest to uncover the mystery of a library haunting. Is it a lost family member of Kaz's? As they delve deeper, unexpected twists challenge their newfound friendship and reveal secrets that could change everything. Can they solve the mystery before it's too late?
In reading order
The Haunted Library Series
10 books · Published 2014–2017
#1
Sale price
$759
The Haunted Library
Chapter Book · Ages 6–8 · 2014
A young ghost named Kaz is swept away from his family's home by a strong wind and must navigate a new and unfamiliar world, including a mysterious library where he meets a girl who can see and hear him.
#2
Sale price
$674
The Ghost in the Attic
Chapter Book · Ages 6–8 · 2014
A young ghost boy and his friend, a human girl, start a detective agency to solve mysteries and find the boy's lost family.
#3
Sale price
$674
The Ghost Backstage
Chapter Book · Ages 6–8 · 2014
A young ghost named Kaz tries to find his family with the help of his friend Claire, a solid girl who can see ghosts.
#4
Sale price
$759
The Five O'Clock Ghost
Chapter Book · Ages 6–8 · 2015
A ghostly mystery unfolds at five o'clock. Is it Kaz's missing brother?
#5
Sale price
$674
The Secret Room
Chapter Book · Ages 6–8 · 2015
A young boy and his brother try to solve the mystery of a secret room in their library home.
#6
Sale price
$674
The Ghost at the Fire Station
Chapter Book · Ages 6–8 · 2015
Kaz searches for his missing family while solving a ghostly mystery.
#7
Sale price
$674
The Ghost in the Tree House
Chapter Book · Ages 6–8 · 2016
Strange noises haunt a tree house. Rival club or ghostly presence?
#8
Sale price
$674
The Hide-and-Seek Ghost
Chapter Book · Ages 6–8 · 2016
A haunted house threatens a sale. Can Kaz and Claire solve the mystery?
#9
Sale price
$674
The Ghosts at the Movie Theater
Chapter Book · Ages 6–8 · 2017
A ghostly search for a missing uncle leads to unexpected allies and mysteries.
#10
Sale price
$759
The Underground Ghosts
Chapter Book · Ages 6–8 · 2017
A ghost's family is missing. Can young detectives solve the mystery before Halloween?
Good to know
Common Questions
How many books are in the Haunted Library series?
There are 10 books in the Haunted Library series. It began with The Haunted Library in 2014, and the newest book, The Underground Ghosts, was published in 2017.
What order should you read the Haunted Library books in?
Start with The Haunted Library and follow the series order — the books above are numbered #1 through #10.
What ages are the Haunted Library books best for?
The series is best for ages 6–8, based on the age ranges of the individual books.
Which Haunted Library book is the longest?
The Underground Ghosts (Book #10) is the longest book in the series at 19,146 words (192 pages).
Which Haunted Library book is the shortest?
The Haunted Library (Book #1) is the shortest at 11,620 words (128 pages).
The people
The Creatives Behind the Books
The people who bring The Haunted Library to life.
Keep exploring
Similar Series
Dragon Slayers' Academy
Ages 7–10
Gooney Bird Greene
Ages 6–9
Ballpark Mysteries
Ages 6–9
Dragon Girls
Ages 7–10
The Never Girls
Ages 6–10
Mindy Kim
Ages 6–8
Keena Ford
Ages 6–8
Ruby Lu
Ages 6–10