Kensy and Max series by Jacqueline Harvey
Greenglass House by Kate Milford
The Mysterious Benedict Society series by Trenton Lee Stewart
Theodore Boone series by John Grisham
The mystery of Black Hollow Lane by Julia Nobel
All the Wrong Questions series by Lemony Snicket
You won’t believe this by Adam Baron
The secret of the night train by Sylvia Bishop
Sisters Grimm series by Michael Buckley
The secret starling by Judith Eagle
The smuggler’s secret by Elly Griffiths
The mystery of the moon tower by Francesco Sedita and Prescott Seraydarian
Winterhouse series by Ben Guterson
The Thornthwaite Betrayal by Gareth P. Jones
Agatha Oddly series by Lena Jones
Adventures on Trains series by M.G. Leonard and Sam Sedgman
The house on Hoarder Hill by Mikki Lish and Kelly Ngai
The mega quiz by Barbara Mitchelhill
Friday Barnes series by R.A. Spratt
The Girl, the Dog and the Writer series by Katrina Nannestad
Curiosity House series by Lauren Oliver and H.C. Chester
Anisha, accidental detective by Serena Patel
His name was Walter by Emily Rodda
The missing skull by John Wilson