Big Nate (chapter book series and graphic novel series) - by Lincoln Peirce
Percy Jackson and the Olympians series and Heroes of Olympus series - by Rick Riordan
Harry Potter series - by J. K. Rowling
The Babysitters Club series (chapter books/graphic novels) - by Ann Martin/RainaTelgemeier
A Series of Unfortunate Events - by Lemony Snicket
I Survived series - by LaurenTarshis
Wings of Fire (chapter book series and graphic novel series) - by Tui Sutherland
39 Clues series - by various authors
Series of Unfortunate Events series - by Lemony Snicket
Goosebumps series - by R. L. Stine
Warriors series by Erin Hunter
Dork Diaries series - by Rachel Renee Russell
Who Was series - by various authors
Amulet series (graphic novel) - by Kazu Kibuishi
Raina Telgemeier books (examples: Sister, Smile, and Drama)
Bone series (graphic novel) - by Jeff Smith
Who Would Win series - by Jerry Pallotta
Land of Stories series - by Chris Colfer
Masterminds series - by Gordon Korman
President series - by Sherri Windston
Trapped in a Video Game series - by Dustin Brady
Diary of a 6th Grade Ninja series - by Marcus Emerson/Sal Hunter/Noah Child
Middle School series - by James Patterson