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

1 The Midnight Gang
David Walliams & Tony Ross HarperCollins $24.99
9780008188573
2 Night School
Lee Child
Random House $38.00
9780593073919
3 Double Down
Jeff Kinney
Penguin  $17.99
9780143309338
4 The Sellout
Paul Beatty
Oneworld Publications $27.99
9781786070173
5 Gecko Annual
Eds Kate De Goldi, Susan Paris
Gecko Press $39.99
9781776570775
6 Wellington in Your Pocket  Fitzbeck Publishing
Fitzbeck Publishing $25.00
9780473362850
7 We the Ones
Julie Helean
Julie Helean $30.00
9780473366636
8 A Striking Truth
Helen McNeil
Cloud Ink Press $28.00
9780473367824
9 Five Go Gluten-Free
Bruno Vincent
Hachette $19.99
9781786482228
10 The Wish Child
Catherine Chidgey
Victoria University Press $30.00
9781776560622
11 Rather be the Devil
Ian Rankin
Hachette  $37.99
9781409159414
12 The Riviera Set
Mary S. Lovell
Hachette $39.99
9781408705223
13 My Father's Island: A Memoir Adam Dudding
Victoria University Press $35.00 9781776560820
14 The 78-Storey Treehouse
Andy Griffiths & Terry Denton Pan Macmillan $17.99
9781743535004
15 Swing Time
Zadie Smith
Hamish Hamilton $37.00
9780241247310
16 The Great War for New Zealand: Waikato 1800-2000 Vincent O'Malley
Bridget Williams Books $79.99
9781927277577
17 The Secret Diary of Hendrik Groen, 83 Years Old
Hendrik Groen & Hester Velmans
Penguin  $37.00
9780718182953
18 Five on Brexit Island
Bruno Vincent
Hachette $19.99
9781786483843
19 All the Light We Cannot See Anthony Doerr
HarperCollins $24.99
9780007548699
20 The Wrong Side of Goodbye Michael Connelly
Allen & Unwin  $36.99
9781760293833