London 1940. As the war rages in Europe, Rose Brown steps on board a ship bound for America, hoping to escape the danger. She's frightened, but her widowed mammy and three sisters in Ireland need the money she earns as nanny to the rich Townsend family. But while Rose plays with baby Sarah in the salty spray on deck, disaster strikes, and the ocean liner begins to sink. In the chaos, Rose and the baby are separated from the family.

Dublin, 1952. When Mary Kate Ryan receives a surprise inheritance from the woman who abandoned her as a tiny baby, she’s stunned. All her life, she has longed to know why her mother disappeared, and now she’s devastated to realize that every lonely night she spent without a home or family of her own, her mother knew exactly where she was.

London, 1942: Thirteen-year-old Nell and five-year-old Olive are being sent away from home to escape the devastation of the East End during the Blitz. Leaving behind their beloved mother and brothers, they don’t know if they will ever see them again. As the sisters adjust to their new life in a close-knit Welsh village, they gradually find hope in the friendships they make. And Nell kindles a special bond with fellow evacuee Jimmy, who makes her smile even at the hardest of times. But when little Olive’s safety is threatened, Nell makes a decision that will change their lives forever.

When Cissy Ryan’s real mother comes to claim her from the workhouse, it’s not how she imagined. Her family’s tumbledown cottage has ice on the inside of its windows and is in an isolated, poverty-stricken village in the muddy Irish countryside. But when Cissy is allowed to help neighbour Colm Doyle and his horse named Blue on their milk round one morning, Cissy starts to feel as though friendship could get her through anything.

Ireland, 1924. For 13-year-old Nora Doyle every day is a fight for survival in Ballybun, the rural Irish village she calls home. Each night, as she feels the cold wind blowing through the cracks of her family’s cramped cottage, Nora longs to escape the poverty surrounding her and find her place in the world. When she meets Edward, from the grand house that looms over her tiny village, she feels an unlikely kinship that is impossible to explain, and as she grows from an impulsive child into a beautiful woman, Nora spends every moment she can with him.

The day Titanic sails from Queenstown, taking with it the hopes and dreams of so many, Harp’s life too is devastated. The small port town is shaken to its foundations at the loss of the unsinkable ship, but the revelation of a long-held secret means that Harp and Rose have a much more pressing issue to solve, one that could destroy them if they cannot find a solution.

Robinswood, Co. Waterford, 1939. The once grand house is home to two very different families. Despite delusions of grandeur, Lord and Lady Kenefick and their adult children live a life of decayed opulence as the money needed to keep such a large house and grounds ever dwindles. Meanwhile, the Murphy family, Dermot, Isabella and their three almost grown-up girls, live and work on the estate and do their best to keep everything running smoothly.

For three young boys, Liam, Patrick, and Hugo, life in Ireland of the 1960s proves to be both idyllic and flawed. Living in close proximity but leading vastly different lives, the bonds of friendship bind these young men as they grow, dream, and navigate the storms of youth.

Maeve McKenna is on the verge of a breakdown. Having worked herself into the ground as a sought-after interior designer in London, she’s in desperate need of a vacation. Philomena Duffy is a little lonely. After losing her husband, their crumbling mansion, Willow House, feels awfully empty. With the rugged shores of Ireland calling, Maeve visits her aunt Philomena in Sandy Cove, where she once, as a teenager, kissed a wild, mysterious boy - a kiss she has never been able to forget.

Life is calm and fairly predictable. Until something unthinkable happens in our sleepy backwater. A crime, but not like anything I've ever seen before. It's a complete mystery. And it's up to me to solve it.

Bristol, 1939. School leaver Maisie Miles suspects her father, a small-time crook, has an ulterior motive for insisting she gets a job at the W. D. & H. O. Wills tobacco factory but keeps it to herself. She's befriended by effervescent Phyllis Mason and kind-hearted Bridget Milligan who take pity on her and take Maisie under their wing. But beneath their happy-go-lucky exteriors, they all harbour dreams and worries about what the future holds.

It was a misty Wednesday morning. Inside the Gestapo headquarters, you could cut the tension with a knife. There was a traitor in their midst: Someone had leaked a list of the SS to the British press. The head of the Gestapo called me into his office. Panelled oak walls, a grand piano in the corner, rugs lining the floor—the place where he ordered executions every day.

In the first book, What Once Was True, two families, one of grandeur and one of the working class, navigate the conflicts associated with the looming war ahead. Despite delusions of grandeur, Lord and Lady Kenefick and their adult children live a life of decayed opulence as the money needed to keep such a house and grounds ever dwindles.

London, 1940. Bombs fall and Josie Banks’ world crumbles around her. Her overbearing husband, Stan, is unreachable, called to service. Her home, a ruin of rubble and ash. Josie’s beloved tearoom boss has been killed, and Josie herself is injured, with nothing left and nowhere to go. Evacuated to the English countryside, Josie ends up at the estate of the aristocratic Miss Harcourt, a reluctant host to the survivors of the Blitz. Now a threat looms larger than anyone imagined. And a dangerous secret is about to upend Josie’s life again.

Mary Doyle arrives in Dublin in 1913, doomed, she fears, to a life of domestic service. Instead, however, she finds herself deeply affected by the social and political turmoil of a fledgling nation struggling for independence. Suddenly, all that was once inevitable is no longer a certainty as she is embroiled in the very heart of the Easter Rising.