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

1 The Broken Decade: Prosperity, Depression and Recovery in New Zealand, 1928-39
Malcolm McKinnon
Otago University Press $49.95
9781927322260
2 A Constitution for Aotearoa New Zealand
Geoffrey Palmer & Andrew Butler
Victoria University Press $25.00
9781776560868
3 The 78-Storey Treehouse
by Andy Griffiths & Terry Denton
Pan Macmillan  $17.99
9781743535004
4 Born to Run
Bruce Springsteen
Simon & Schuster $49.99
9781471157790
5 Nutshell
by Ian McEwan
Jonathan Cape $38.00
9781911214335
6 Homo Deus: A Brief History of Tomorrow
Yuval Noah Harari
Harvill Secker Random House  $40.00
9781910701881
7 The Pigeon Tunnel: Stories from My Life
John Le Carre
Viking Penguin Books $38.00
9780241976876
8 Commonwealth
Ann Patchett
Bloomsbury Publishing $32.99
9781408880395
9 Hera Lindsay Bird
by Hera Lindsay Bird
Victoria University Press $25.00
9781776560714
10 Harry Potter and the Cursed Child
by J. K. Rowling, Jack Thorne & John Tiffany
Hachette $49.99
9780751565355
11 Dr Libbys Womens Wellness Wisdom: What Every Woman Needs to Know
Dr. Libby Weaver
Little Green Frog Publishing  $39.95
9780473360887
12 Gecko Annual
Kate De Goldi & Susan Paris  Gecko Press $39.99
9781776570775
13 The Diamond Horse
Stacy Gregg
HarperCollins $24.99
9780008124397
14 Red Herring
Jonothan Cullinane   HarperCollins $36.99
9781775540984
15 Scrumptious
Chelsea Winter
Random House $50.00
9780143770107
16 The Secret Diary of Hendrik Groen, 83 Years Old
Hendrik Groen
Michael Joseph $37.00
9780718182953
17 The World's Worst Children David Walliams
HarperCollins $24.99
9780008197049
18 A Brief History of Everyone Who Ever Lived: The Stories in Our Genes
Adam Rutherford
Weidenfeld & Nicolson Hachette $39.99
9780297609384
19 Les Parisiennes: How the Women of Paris Lived, Loved and Died in the 1940s
Anne Sebba
Weidenfeld & Nicolson $39.99
9781474601733
20 The Sympathizer
Viet Thanh Nguyen
Corsair $27.99
9781472151360