Cecelia Ahern
The Irish novelist behind P.S. I Love You, now writing for children.
Cecelia Ahern is a novelist and children’s author. The Irish novelist behind P.S. I Love You, now writing for children. This page is a short guide for parents, teachers and young readers: who they are, which of their books are in the current top 20 and where to start.
About Cecelia Ahern
Cecelia Ahern is an Irish novelist who made her debut at 21 with P.S. I Love You (2004), which became a bestseller and was made into a film starring Hilary Swank. Her second novel, Love, Rosie, was also filmed. A news report on her children’s launch gives 21 novels in 30 languages, with 25 million copies sold.
Detective Thingy Majiggy is her first children’s series, for readers aged 7 and over. It follows ten-year-old Mia, who moves into a foster home with Detective Lucy and can communicate with everyday objects, which help her solve mysteries. HarperCollins is the publisher.
Cecelia Ahern’s books in the top 20
- Detective Thingy Majiggy: number 18 in the list we checked on 7 November 2026. Mia can talk to everyday objects, and they talk back, which makes her a very useful new detective.
Other well-known books and work
- P.S. I Love You (2004)
- Love, Rosie
- ROAR (short stories)
- Detective Thingy Majiggy
Where to start
Detective Thingy Majiggy is her first children’s series, so start there.
Frequently asked questions about Cecelia Ahern
Who is Cecelia Ahern?
Cecelia Ahern is an Irish novelist who made her debut at 21 with P.S. I Love You (2004), which became a bestseller and was made into a film starring Hilary Swank. Her second novel, Love, Rosie, was also filmed. A news report on her children’s launch gives 21 novels in 30 languages, with 25 million copies sold.
Which books by Cecelia Ahern are in the top 20?
Detective Thingy Majiggy (number 18). See our Top 20 children’s books for the full list.
Where should I start with Cecelia Ahern?
Detective Thingy Majiggy is her first children’s series, so start there.
Biographical details are drawn from publisher biographies, reference works and the author’s own site, and may have changed. The illustration is our own and is not a likeness of the author. See all the authors.