The Let Them Theory: A Life-Changing Tool That Millions of People Can’t Stop Talking About by mother and daughter Mel and Sawyer Robbins is Ireland’s bestselling book of 2025, shifting 38,885 copies.
Mel Robbins began her career as a legal-aid lawyer in New York and wrote her first self-help book, Stop Saying You’re Fine, in 2010, followed by The 5 Second Rule (2017). The Let Them Theory, published in Ireland in December 2024, has sold more than 8 million copies worldwide. The Mel Robbins Podcast, launched in 2022, is in the top 15 US podcasts.
The Housemaid, a 2023 thriller by American author Freida McFadden, is second, with 34,683 sales. A film adaptation has just been released in the US, directed by Paul Feig and starring Sydney Sweeney and Amanda Seyfried. A sequel, The Housemaid’s Secret, is 27th.
Small Things Like These by Claire Keegan, the highest-ranked Irish author, is third. This is the fourth year in which this title has featured in the Irish top 10, and it has now sold more than 160,000 copies in the Republic alone.
Next is Sunrise on the Reaping, The Hunger Games sequel, by Suzanne Collins; Diary of a Wimpy Kid: Partypooper, the 20th in Jeff Kinney’s bestselling children’s series; and Always Remember: The Boy, the Mole, the Fox, the Horse and the Storm by Charlie Mackesy, his sequel to the No 1 bestseller The Boy, The Mole, The Fox and The Horse.
In seventh place is The Ghosts of Rome, the second in Joseph O’Connor’s Rome Escape Line trilogy after My Father’s House. It was recently named Irish Book of the Year. The top 10 is completed by Guinness World Records 2026, followed by Sally Rooney’s fourth novel, Intermezzo, and the textbook, Mathematical Tables.
An exposé of the Kilkenny hurler-turned-swindler, The Dodger: DJ Carey and the Great Betrayal, by Eimear Ní Bhraonáin, in 11th place, is the bestselling Irish nonfiction title and the bestselling book by an Irish publisher, Merrion Press.
The Impossible Fortune, the latest in Richard Osman’s Thursday Murder Club series, is 12th, followed by Ireland rugby coach Andy Farrell’s autobiography, The Only Way I Know, just ahead of another memoir, Poor, by Katriona O’Sullivan, still selling strongly a year after publication.
Next is Ninety-Nine Words for Rain (and One for Sun) by the late Manchán Magan, who has two other titles in the top 100: Listen to the Land Speak (56th) and 32 Words for Field (94th), selling almost 40,000 copies in total.
In 16th is Sophie’s Swaps, by Sophie Morris, a guide to healthier eating; followed by Onyx Storm by Rebecca Yarros and Binding 13 by Cork author Chloe Walsh, both romantasy titles; and by Big Jim Begins by Dav Pilkey, the bestselling children’s author.
In 20th place is Jacqueline Connolly’s Deadly Silence: A Sister’s Battle to Uncover the Truth Behind the Murder of Clodagh and Her Sons by Alan Hawe, which was named Non-Fiction Book of the Year last month at the Irish Book Awards. Close behind, in 23rd place, is Sarah Corbett Lynch’s account of her father’s killing, A Time for Truth: My Father Jason and My Search for Justice and Healing, which won Biography of the Year.
Irish Novel of the Year, Nesting, by Roisín O’Donnell, is 24th, followed by My Favourite Mistake by Marian Keyes and It Should Have Been You by thriller-writer Andrea Mara. Matt Cooper’s Dynasty, a profile of the family behind Dunnes Stores, is 28th, followed by Marie Cassidy’s Deadly Evidence and Hector Ó hEochagáin’s An Irish Word a Day.
The Impossible Fortune is the UK’s bestselling title, followed by The Housemaid and Always Remember. The Let Them Theory is 11th. Marian Keyes’ My Favourite Mistake (36th) is the bestselling Irish title, selling almost 162,000 copies; followed by Sally Rooney’s Intermezzo (43rd, 151,675); and Guess How Much I Love You by the late Sam McBratney (77th, 116,005).
The figures are compiled by Nielsen BookScan, which covers 70 per cent of all retail sales in Ireland and 90 per cent in the UK.