It depends what you are looking for in a book really. I don't have Audible but I imagine many prolific writers are on there. I'd echo a lot of others choices.
Kate Atkinson, like you Maggie Behind the Scenes at the Museum, Life after Life, another favourite.
Lisa Jewell's later books are very good, she's veering more towards crime now.
Margaret Atwood, particularly The Blind Assassin and Alias Grace.
If you like crime any of these, Louise Candlish, Elly Griffiths Ruth Galloways are good, as are Val McDermid's Karen Pirie series. Anne Cleeves Vera/Shetland and her new character Matthew Venn, Susie Steiner only written a couple but they are good. Also Robert Galbraith particularly loved the last one Troubled Blood. Another one I read this year, The Appeal, most of which was written in the form of emails, nevertheless worked very well.
Amanda Craig very good for state of the nation type books would definitely recommend The Lie of the Land and The Golden Rule.
Love, love Kate Morton and Lucinda Riley for setting their stories in two time frames that cantilever together towards the end.
William Boyd, all his stories are very different, particularly liked Ordinary Thunderstorms exploring the dark side of the pharmaceutical industry, both clever and witty and very funny at times.
Elizabeth Strout and Ann Tyler for small town America.
My all time favourite the late Ruth Rendell, The Chimney Sweep's Boy and Asta's Book both exceptional.