L J Ross and Nadiya Hussain shake up the Amazon charts

Rachel Abbott's And So It Begins (Wildfire) was once again top of Amazon's Most Sold fiction charts, holding on to the number one for a second week. However, L J Ross' Penshaw, the 13th title in her self-published DCI Ryan series, rocketed into second place in Most Sold and went all the way to the top in the Most Read fiction chart, knocking Harry Potter and the Philosopher's Stone (Pottermore/Bloomsbury) from the summit. The crime title earned Amazon's "most anticipated" tag, with more pre-orders for Penshaw than any other title on the list.

The Harry Potter titles once again dominated the Most Read fiction chart, which ranks both daily Kindle readers and Audible listeners, with all seven books in the top 10. Stephen Fry's Audible Original Sherlock Holmes collection also charted for a second week, with his re-telling of the Greek myths Mythos (Penguin), in 13th, racking up more Audible listeners than Kindle readers last week, according to the retailer.

The Official UK Top 50 number one through Nielsen BookScan, David Walliams' The World's Worst Teachers (HarperCollins), fell eight places in the Most Sold fiction chart to 12th, which perhaps indicates Walliams' strength in supermarkets and the high street. The title, which has sold over 275,000 copies in hardback since the end of June through the BookScan TCM, was another Audible favourite, with more listeners than Kindle readers.

Though the Richard and Judy Book Club is a W H Smith print promotion, its reach does seem to spread beyond the high street, with Susan Lewis' One Minute Later (HarperCollins) debuting in the Most Sold fiction chart in fourth place. A former Richard and Judy alumnus, A J Pearce's Dear Mrs Bird (Picador), also sold strongly, rising five places to eighth.

Nadiya Hussain's Time to Eat (Michael Joseph) leapt nine places in the Most Sold non-fiction chart, the same week it soared 87% in volume week on week through the BookScan TCM. The huge soar in sales, which has seen Hussain record her best ever single-week total through Nielsen, was no doubt assisted by the start of the companion BBC TV show. However, Adam Kay's blockbuster junior doctor memoir This is Going to Hurt (Picador) pipped it into first place in the Amazon Most Sold non-fiction chart, rising two places on the week before.

But Michelle Obama's Becoming (Penguin) maintained its hold on the Most Read non-fiction number one, with This is Going to Hurt in second place. Yuval Noah Harari's Sapiens and Homo Deus (Vintage) both made the Most Read chart in third and 20th place respectively, with both more listened-to in Audible format than read on a Kindle.

The Secret Barrister (Picador) earned eighth place in both the Most Read and Most Sold non-fiction charts, and earned the award of most quotable book in the chart, with readers highlighting passages on their Kindles more frequently than any other title in the chart. However, Raynor Winn's The Salt Path (Penguin), in 14th place in both Most Read and Most Sold, inspired fans to discuss it—it was reviewed by its readers in the least amount of time after finishing.