The pressure might have been too much for some writers but not Kate Atkinson: just two years after winning the Costa novel award for Life After Life, a major bestseller hailed as “astonishing” by judges at the time, the novelist has landed the prize again for her follow-up, A God In Ruins.

Described as “utterly magnificent and in a class of its own. A genius book” by the judges, A God In Ruins tells the story of WWII British bomber pilot Teddy Todd, brother of Ursula, the many versions of whose life and death were recounted by Atkinson in Life After Life.

Taking its title from the Ralph Waldo Emerson quote, “a man is a god in ruins”, the novel, Atkinson’s ninth, beat Man Booker prize winner Anne Enright’s contender, The Green Road; Patrick Gale’s A Place Called Winter; and Melissa Harrison’s At Hawthorn Time to the top in the Costa Book Awards’ novel category.

The win makes Atkinson the first author ever to land three Costa category awards, after taking the best novel prize for Life After Life in 2013, and the best first novel prize for her debut, Behind The Scenes At The Museum, in 1995.

A God In Ruins is possibly the best novel I’ve written so it is absolutely wonderful to have it validated in this way,” said Atkinson when the win was announced recently.

“I think it’s just astonishing, a stunning, stunning book,” said judge and author Cathy Rentzenbrink. “I don’t think there’s anybody whose life would not be enriched by reading it. It fits with her work, while also being a crowning triumph.”

Atkinson describes A God In Ruins as “a ‘companion’ piece rather than a sequel” to Life After Life.

“When I first decided that I wanted to write a novel set during the second world war, I rather grandiosely believed that I could somehow cover the whole conflict in less than half the length of War And Peace. When I realised this was too daunting a challenge – for both reader and writer – I chose the two aspects of the war that interested me most and which I thought provided the richest material: the London blitz and the strategic bombing campaign against Germany,” she writes in her author’s note to the novel.

Life After Life tackles Ursula’s experiences during the blitz, while A God In Ruins follows Teddy’s life as a pilot in RAF Bomber Command.

“Ursula lived many versions of her life in the previous novel, which gave me a certain freedom when it came to Teddy’s own life, many of the details of which are different in this book,” writes Atkinson. “I like to think of A God In Ruins as one of Ursula’s lives, an unwritten one. This sounds like novelist trickery, as indeed it perhaps is, but there’s nothing wrong with a bit of trickery.”

“You don’t at all have to have read Life After Life before you read this one,” said Rentzenbrink. “But if you hadn’t, you would then want to.”

Over 630 books were submitted for the 2015 Costa Book Awards, which go to the “most enjoyable” books written by authors resident in Britain and Ireland. Along with Atkinson, four other writers were named as winners in different categories, each of whom will receive £5,000 (RM32,000).

Former teacher and librarian Andrew Michael Hurley’s Gothic chiller, The Loney, in taking the first novel prize, was called “as close to the perfect first novel as you can get” by judges. The Costa biography award went to Andrea Wulf’s The Invention Of Nature, a biography of Alexander von Humboldt, the scientist who inspired Charles Darwin but who is almost forgotten today. Judges called it a “thrillingly readable story of a visionary 18th-century scientist and adventurer”.

The Scottish poet Don Paterson won the poetry prize for his new collection, 40 Sonnets, was praised as “a tour de force by a poet at the height of his powers”, while Frances Hardinge took the children’s award for her “dark, sprawling, fiercely clever” Victorian murder mystery, The Lie Tree.

All five winners will now go forward to compete for the overall Costa Book of the Year prize, which Atkinson won in 1995 for Behind The Scenes At The Museum.

If Atkinson wins again this year, she will be the first novelist to do so – although poets Ted Hughes and Seamus Heaney both won the book of the year twice, a novelist never has to date. Worth £30,000 (RM190,000), the Costa Book of the Year prize has been won 11 times by a novel, five times by a first novel, six times by a biography, seven times by a poetry collection and just once by a children’s book.

The 2015 overall winner will be announced on Jan 26. – Guardian News & Media