A Box Full of Murders

Shortlisted for The Week Junior Book Awards 2026: Children's Book of the Year: Breakthrough Category 
 
Shortlisted for the Books Are My Bag Readers Awards 2025: Children’s Fiction Category 
 
'Pure catnip for budding young sleuths' The Telegraph 
 
The first children's murder mystery from number-one-bestselling author of The Appeal, Janice Hallett, perfect for fans of Robin Stevens and Rhian Tracey. 
 
When Ava and Luke discover a mysterious box of papers in their attic they are instantly curious about secrets it might hold. As they read through letters, diary entries, newspaper cuttings and listen to secret recordings, they realize that a decades-old, still unsolved, murder mystery is unfolding right in front of them . . . 
 
Ava and Luke decide to try and crack the case themselves. But as they work through the clues, it soon becomes clear that the mystery isn't something left in the past: the killer is still out there - and might be closer than they think... 
 
YOU know the facts. YOU have all the clues. Can YOU solve the mystery before they do? 
 
Look out for DEATH AT THE MUSEUM, the next book in the A Box Full of Murders series, coming June 2026!

Heralded as 'Agatha Christie for the 21st Century', Janice Hallett's adult murder mystery novels with an epistolary twist have sold over half a million copies through TCM to date and been sold into 17 languages. Her debut book, THE APPEAL, was named Sunday Times Crime Book of the Year and awarded the CWA Debut Dagger. Her four adult follow-up novels have also all been Sunday Times Bestsellers. Her debut children's novel, A BOX FULL OF MURDERS, was the bestselling children's mystery of 2025 and shortlisted for the Books Are My Bag Reader Awards.

The first children's murder mystery from number-one-bestselling author of The Appeal, Janice Hallett, perfect for fans of Robin Stevens and Rhian Tracey. 
 
When Ava and Luke discover a mysterious box of papers in their attic they are instantly curious about secrets it might hold. As they read through letters, diary entries, newspaper cuttings and listen to secret recordings, they realize that a decades-old, still unsolved, murder mystery is unfolding right in front of them . . . 
 
Ava and Luke decide to try and crack the case themselves. But as they work through the clues, it soon becomes clear that the mystery isn't something left in the past: the killer is still out there - and might be closer than they think... 
 
YOU know the facts. YOU have all the clues. Can YOU solve the mystery before they do? 
 
Look out for DEATH AT THE MUSEUM, the next book in the A Box Full of Murders series, coming June 2026!

Mummy Fairy and Me: Mermaid Magic

The perfect story to read together with your little one! 
 
My mummy looks normal, like any other mummy . . . but she's not. Because she can turn into a fairy. All she has to do is stamp her feet three times, clap her hands, wiggle her bottom and say 'Marshmallow' . . . and POOF! She's Mummy Fairy. 
 
 Ella's family has a BIG secret - her mummy is a fairy! But sometimes Mummy Fairy's magic goes wrong, and then it's up to Ella to help. 
 
In this book of enchanting adventures, Mummy Fairy and Ella decorate the kitchen with magic colouring pencils, catch a robber on Ella's school trip - and swim with real mermaids! 
 
The fourth book in this magical series for 5-7 year olds, from global bestselling author Sophie Kinsella.

Sophie Kinsella (Author) 
 Sophie Kinsella is an international bestselling writer. She is the author of many number one bestsellers, including the hugely popular Shopaholic series. She has also written seven bestselling novels as Madeleine Wickham. She lives between London and the country with her husband and family. 
 
Marta Kissi (Illustrator) 
 Marta Kissi is a London based illustrator who was born in Warsaw. She studied BA Illustration &amp; Animation at Kingston University and MA Communication Art &amp; Design at the Royal College of Art. Visit her website at www.kissikissi.com.

My mummy looks normal, like any other mummy . . . but she's not. Because she can turn into a fairy. All she has to do is stamp her feet three times, clap her hands, wiggle her bottom and say 'Marshmallow' . . . and POOF! She's Mummy Fairy. 
 
Ella's family has a BIG secret - her mummy is a fairy! But sometimes Mummy Fairy's magic goes wrong, and then it's up to Ella to help. In this fourth enchanting book, Mummy Fairy and Ella decorate the kitchen with magic colouring pencils, catch a robber on Ella's school trip - and swim with real mermaids!

Mummy Fairy and Me: Unicorn Wishes

The perfect book to read together with your little one! 
 
My mummy looks normal, like any other mummy . . . but she's not. Because she can turn into a fairy. All she has to do is stamp her feet three times, clap her hands, wiggle her bottom and say 'Marshmallow' . . . and POOF! She's Mummy Fairy. 
 
Ella's family has a big secret - her mummy is a fairy! But sometimes Mummy Fairy's magic goes wrong, and it's up to Ella to help... 
 
In this third book of adventures about Mummy Fairy and Ella, you'll find: 
 
Flying cars 
Enchanted ballet shoes 
A unicorn in the kitchen 
And Ella's very own magical wardrobe! 
 
The third magical book in this wonderful series for 5-7 year olds, from global bestselling author Sophie Kinsella.

My mummy looks normal, like any other mummy . . . but she's not. Because she can turn into a fairy. All she has to do is stamp her feet three times, clap her hands, wiggle her bottom and say 'Marshmallow' . . . and POOF! She's Mummy Fairy. 
 
Ella's family has a big secret - her mummy is a fairy! But sometimes Mummy Fairy's magic goes wrong, and it's up to Ella to help... In this third book of adventures about Mummy Fairy and Ella, you'll find flying cars, enchanted ballet shoes, a unicorn in the kitchen, and Ella's very own magical wardrobe.

Mummy Fairy and Me: Fairy-in-Waiting

The perfect story to read together with your little one. 
 
My mummy looks normal, like any other mummy . . . but she's not. Because she can turn into a fairy. She just has to shut her eyes tight, say 'Marshmallow' . . . and POOF! She's Mummy Fairy. 
 
Ella's family has a big secret - her mummy is a fairy! She can do amazing spells with her computawand. Only, sometimes the spells go a bit wrong, and that's when Ella steps in to the rescue. 
 
In this brand-new book of magical adventures, there are very naughty monkeys, a swimming pool filled with ice cream, and the best birthday party ever - complete with giant cakes and fairy dust. 
 
And after so much fun and adventure, will Ella get her wish and become a magical fairy, just like her mum? 
 
The second book in this magical series for 5-7 year olds, from global bestselling author Sophie Kinsella.

Hello. I'm called Ella Brook and I live in a town called Cherrywood. My best friends at school are Tom and Lenka. My worst enemy is Zoe. And then there is my mummy. She looks normal, like any other mummy . . . but she's not. Because she can turn into a fairy. She just has to shut her eyes tight, say 'Marshmallow' . . . and POOF! She's Mummy Fairy. 
 
Ella's family has a big secret - her mummy is a fairy! She can do amazing spells with her computawand. Only, sometimes the spells go a bit wrong, and that's when Ella steps in to the rescue. In this brand-new book of magical adventures, there are very naughty monkeys, a swimming pool filled with ice cream, and the best birthday party ever - complete with giant cakes and fairy dust.

Mummy Fairy and Me

The perfect book to read together with your little one! 
 
My mummy looks normal, like any other mummy . . . but she's not. Because she can turn into a fairy. She just has to shut her eyes tight, say 'Marshmallow' . . . and POOF! She's Mummy Fairy. 
 
Ella's family have a big secret . . . her mummy is a fairy! She can do amazing spells with her computawand to make delicious cupcakes, create the perfect birthday party and cause chaos at the supermarket. But sometimes the spells go a bit wrong and that's when Ella comes to the rescue! 
 
The first magical book in this wonderful series for 5-7 year olds, from global bestselling author Sophie Kinsella.

Likely to win her as many fans in a younger generation

An excellent read-together for families . . . inventive and charming

Readers will be content to laugh over the fairy magic hijinks

Handled with Sophie's distinct fun and humour

Hello. I'm called Ella Brook and I live in a town called Cherrywood. I have blue eyes and dark brown hair. My best friends at school are Tom and Lenka. My worst enemy is Zoe. And then there is my mummy. She looks normal, like any other mummy . . . but she's not. Because she can turn into a fairy. She just has to shut her eyes tight, say 'Marshmallow' . . . and POOF! She's Mummy Fairy. 
 
Ella's family have a big secret . . . her mummy is a fairy! She can do amazing spells with her computawand to make delicious cupcakes, create the perfect birthday party and cause chaos at the supermarket. But sometimes the spells go a bit wrong and that's when Ella comes to the rescue! 
 
Magic and mayhem in this sweet and funny new series for 5-7 year olds from global bestselling author Sophie Kinsella.

Janice Hallett

Marta Kissi

The second children’s murder mystery from number-one-bestselling author of The Appeal, Janice Hallett, perfect for fans of Robin Stevens and Rhian Tracey. 
 
Imagine an old museum with more secrets than anyone could ever guess. A school trip that ends in murder. A crime unsolved for decades. . . But who did it? 
 
Now, Ava and Luke are on the case, following the clues left in a new box of murders. Using School workbooks, museum records, secret recordings and letters the siblings start to unravel the mystery of a body in the basement. But can they discover what really happened . . . before the killer strikes again? 
 
YOU know the facts. YOU have all the clues. Can YOU solve the mystery before they do?

Marta Kissi

Books by Marta Kissi

Series by Marta Kissi

A Box Full of Murders4 Books

Mummy Fairy4 Books

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