The book, based on a viral theory created by podcaster Mel Robbins, is Ireland’s bestselling book of 2025, selling 38,885 copies in the country, according to the Irish Times.
"The Let Them Theory: A Life-Changing Tool That Millions of People Can’t Stop Talking About" is written by mother and daughter, Mel and Sawyer Robbins.
Meanwhile, people are still reading books for entertainment. "The Housemaid", a 2023 thriller by American author Freida McFadden, was the second most popular book in the country. The novel made 34,683 sales in 2025.
Despite international authors dominating the top two spots, Wicklow woman Claire Keegan came in third place. Her book, "Small Things Like These", sold more than 160,000 copies in the Republic alone.
The novel was made into a movie starring Cillian Murphy, which also did pretty well at the box office.
"Sunrise on the Reaping", "The Hunger Games" prequel, came in fourth. The novel, by Suzanne Collins, did well across the world.
"Diary of a Wimpy Kid: Partypooper" was also a best seller, while "Always Remember: The Boy, the Mole, the Fox, the Horse and the Storm" by Charlie Mackesy was the sixth most popular in Ireland.
In seventh place is the Irish Book of the Year, "The Ghosts of Rome", while the "Guinness World Records 2026" came in at eighth place.
Sally Rooney has proved a success in Ireland over the years, and so it comes as no surprise that her fourth novel, "Intermezzo", came in at ninth place.
The list was rounded off by a surprising entrant: the textbook, "Mathematical Tables".
Here's to lots of new releases and plenty more reading in 2026!
* This article was initially published on Evoke.ie.
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