Wings of Fire series by Tui T. Sutherland

Warriors by Erin Hunter (any of the Warriors series) or her Survivors series

Spirit Animals by Brandon Mull

Any Rainbow Magic Series Books by Daisy Meadows

Matilda by Roald Dahl

The Witches by Roald Dahl

Bad Guys (series) by Aaron Blabey

Mighty Robot (series) by Ricky Riocotta

I Survived books by Lauren Tarshis

Diary of a Wimpy Kid series by Jeff Kinney

Big Nate series by  Lincoln Peirce

The Weird School Series by Dan Gutman (Miss Daisy is Crazy, etc.)

Where Is? Who Is? What Is? Series of books by Penguin Random House 

Spy School series by Stuart Gibbs

Kingdom Beyond Books by Sayantani Dasgupta 

Fly Guy books by Tedd Arnold

Elephant and Piggie Books by Mo Willems

The Wild Robot Series by Peter Brown

Greetings from Somewhere by Harper Paris (a Mystery Series)