Cecelia Ahern will release her first children’s book this summer

Cecelia Ahern has penned her first children's book

Detective Thingy Majiggy follows ten-year-old Mia, who has just moved into her new foster home with Detective Lucy. Mia harbours a unique secret: she has the extraordinary ability to communicate with inanimate objects. From hats to toasters and pens, Mia can understand them all. With the help of these everyday objects, Mia can solve mysteries, such as uncovering exactly how a fire started in her new classroom.

Warm, funny, highly original, and illustrated throughout in black and white, this is the start of a brand-new series for 7+ readers by beloved author Cecelia Ahern.

Cecelia Ahern said, “I’m absolutely delighted to be publishing my first children’s series with HarperCollins. Detective Thingy Majiggy is a fun, emotional, magical story, and I hope my new readers will welcome Mia Berry into their hearts.”

Cecelia Ahern is an Irish novelist who wrote her debut novel, P.S. I Love You, at the age of 21 years old, which was published in 2004. It became one of the biggest-selling novels of recent years and was made into a hit film starring Hilary Swank, as was her second novel, Love, Rosie, starring Lily Collins.

Her highly acclaimed collection of short stories, ROAR, starring Nicole Kidman, is currently streaming on Apple TV+.

She has been published around the world in 47 countries, in 30 languages, and has sold 25 million copies of her novels.

She has published 21 novels, including two Young Adult novels.

Detective Thingy Majiggy is her first children’s series. There's no doubt her book will be a huge hit with younger readers.

Detective Thingy Majiggy will publish in paperback on 16th July 2026.