That's the audacious question Atkinson's publisher asks on the proof of her new novel, A God in Ruins. Audacious, yes, but there's a reason it's okay to ask that question - because the new Atkinson is even better than the last.
A God in Ruins is a companion novel to Life After Life. A companion, not a sequel, and there's a reason to not call it a sequel that you'll understand once you finish the book. The novel follows Teddy, the younger brother of Life After Life's protagonist Ursula, through the Second World War and across the years, also taking in his descendants.
And that's about all I can say about the plot of A God in Ruins, because anything further would take away from your enjoyment. What I will say is that A God in Ruins is as magical as Life After Life, and it's also a novel that is absolutely stunningly crafted, without the craft ever taking away or distracting from the story. The artistry with which Atkinson writes is awe-inspiring, and her explanation of this book in a lovingly put together author's note just adds to the beauty of the book.