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

1 The 78-Storey Treehouse
by Andy Griffiths & Terry Denton
Pan Macmillan  $17.99
9781743535004
2 Nutshell
by Ian McEwan
Jonathan Cape $38.00
9781911214335
3 To the Summit
Nick Allen
Massey University Press $39.99
9780994130044
4 Red Herring
Jonothan Cullinane HarperCollins  $36.99
9781775540984
5 The Treehouse Fun Book
Jill Griffiths & Andy Griffiths Pan Australia
Pan Macmillan  $14.99
9781743548080
6 Commonwealth
Ann Patchett
Bloomsbury Publishing $32.99
9781408880395
7 Dr Libbys Womens Wellness Wisdom: What Every Woman Needs to Know
Dr. Libby Weaver
Little Green Frog Publishing  $39.95
9780473360887
8 The 13-Storey Treehouse Andy Griffiths
Pan Australia
Pan Macmillan  $14.99
9780330404365
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 The Secret Diary of Hendrik Groen, 83 Years Old
Hendrik Groen
Michael Joseph $37.00
9780718182953
12 Les Parisiennes: How the Women of Paris Lived, Loved and Died in the 1940s
Anne Sebba
Weidenfeld & Nicolson   $39.99
9781474601733
13 Everyone Brave is Forgiven Chris Cleave
Sceptre Hachette $37.99
9781473618701
14 Guinness World Records: 2017 
Guinness World Records $49.99
9781910561324
15 Te Arawa: A History of the Arawa People
Don Stafford
Oratia Books $95.00
9780947506100
16 Barkskins
Annie Proulx
Fourth Estate HarperCollins  $36.99
9780008191764
17 Three Cities
Rod Oram
Bridget Williams Books  $14.99
9780994135407
18 Things That Matter: Stories of Life & Death from an Intensive Care Specialist
Dr David Galler
Allen & Unwin $36.99
9781877505645
19 The Pigeon Tunnel: Stories from My Life
John Le Carre
Viking Penguin Books $38.00
9780241976876
20 Richie McCaw 148
by Richie McCaw
Upstart Press  $69.99
9781927262788