As part of the Indiebound programme, Nielsen BookScan has generously agreed to supply a weekly independent Top 20 bestsellers report.

1 Nutshell
by Ian McEwan
Jonathan Cape $38.00
9781911214335
2 Tupuna Awa: People and Politics of the Waikato River Marama Muru-Lanning Auckland University Press $49.99
9781869408503
3 The 78-Storey Treehouse
by Andy Griffiths & Terry Denton
Pan Macmillan  $17.99
9781743535004
4 Commonwealth
Ann Patchett
Bloomsbury Publishing $32.99
9781408880395
5 The Pigeon Tunnel: Stories from My Life
John Le Carre
Viking Penguin Books $38.00
9780241976876
6 Dr Libbys Womens Wellness Wisdom: What Every Woman Needs to Know
Dr. Libby Weaver
Little Green Frog Publishing  $39.95
9780473360887
7 Homo Deus: A Brief History of Tomorrow
Yuval Noah Harari
Harvill Secker Random House  $40.00
9781910701881
8 A Brief History of Everyone Who Ever Lived: The Stories in Our Genes
Adam Rutherford
Weidenfeld & Nicolson Hachette $39.99
9780297609384
9 Harry Potter and the Cursed Child
by J. K. Rowling, Jack Thorne & John Tiffany
Hachette $49.99
9780751565355
10 Hera Lindsay Bird
by Hera Lindsay Bird
Victoria University Press $25.00
9781776560714
11 Through the Eyes of a Miner: The Photography of Joseph Davis
Simon Nathan
Friends of Waiuta $39.99
9780473353643
12 Richie McCaw 148
by Richie McCaw
Upstart Press  $69.99
9781927262788
13 New Zealands Western Front Campaign
Ian McGibbon
David Bateman $79.99
9781869539269
14 Barkskins
Annie Proulx
Fourth Estate HarperCollins  $36.99
9780008191764
15 Eileen
Ottessa Moshfegh
Vintage Random House  $26.00
9781784701468
16 A Constitution for Aotearoa New Zealand
Geoffrey Palmer & Andrew Butler
Victoria University Press $25.00
9781776560868
17 Three Cities
Rod Oram
Bridget Williams Books  $14.99
9780994135407
18

Queen Bees: Six Brilliant and Extraordinary Society Hostesses Between the Wars - A Spectacle of Celebrity, Talent, and Burning Ambition
Sian Evans
Two Roads Hachette $37.99
9781473618039

19 Things That Matter: Stories of Life & Death from an Intensive Care Specialist
Dr David Galler
Allen & Unwin $36.99
9781877505645
20 The World's Worst Children David Walliams
HarperCollins $24.99
9780008197049