- Up in the Garden and Down in the Dirt, Kate Messner
- Messner, Kate, History smashers
- The seventh wish, Kate Messner
- Plagues and pandemics, Kate Messner ; illustrated by Falynn Koch ; with a special thanks to Ella Messner, who served as a researcher and contributor for this book
- Messner, Kate, Ranger in time, bk. 8
- Messner, Kate, Fergus and Zeke, bk. 2
- Over and under the canyon, by Kate Messner ; with art by Christopher Silas Neal
- The Seventh Wish, Kate Messner
- Messner, Kate, Fergus and Zeke, bk. 4
- Tree of wonder, the many marvelous lives of a rainforest tree, by Kate Messner ; illustrated by Simona Mulazzani
- Breakout, Kate Messner
- Breakout, by Kate Messner
- The Titanic, Kate Messner ; illustrated by Matt Aytch Taylor
- Messner, Kate, History smashers, bk. 1
- Tracking pythons, the quest to catch an invasive predator and save an ecosystem, Kate Messner
- The brilliant fall of Gianna Z., Kate Messner
- Fergus and Zeke and the 100th day of school, Kate Messner ; illustrated by Heather Ross
- Over and under the snow, by Kate Messner ; with art by Christopher Silas Neal
- Messner, Kate, Ranger in time, bk. 12
- Chirp, by Kate Messner
- Messner, Kate, Ranger in time, bk. 10
- Up in the garden and down in the dirt, by Kate Messner ; with art by Christopher Silas Neal
- Marty McGuire digs worms!, Kate Messner ; [container by] Brian Floca
- History Smashers, the Underground Railroad, Kate Messner and Gwendolyn Hooks ; illustrated by Damon Smyth
- Rolling Thunder, by Kate Messner ; illustrated by Greg Ruth
- Over and under the pond, by Kate Messner with art by Christopher Silas Neal
- The brilliant fall of Gianna Z, Kate Messner
- Hurricane Katrina rescue, Kate Messner ; illustrated by Kelley McMorris
- Marty McGuire digs worms!, by Kate Messner ; illustrated by Brian Floca
- All the answers, by Kate Messner
- Over and Under the Pond, Kate Messner
- The next president, the unexpected beginnings and unwritten future of America's presidents, by Kate Messner ; illustrated by Adam Rex
- Messner, Kate, Ranger in time, bk. 9
- Messner, Kate, Marty McGuire, bk. 2
- Fergus and Zeke at the science fair, Kate Messner ; illustrated by Heather Ross
- Night of soldiers and spies, Kate Messner ; illustrated by Kelley McMorris
- Breakout, Kate Messner
- Ranger in time, Kate Messner ; illustrated by Kelley McMorris
- Attack on Pearl Harbor, Kate Messner ; illustrated by Kelley McMorris
- Chirp, Kate Messner
- The Mayflower, Kate Messner ; illustrated by Dylan Meconis
- Emma McKenna, Full Out (the Kids in Mrs. Z's Class #1)
- Escape from the Twin Towers, Kate Messner ; illustrated by Kelley McMorris
- The scariest kitten in the world, by Terrifying Kitten (with help from Kate Messner) ; illustrated by MacKenzie Haley
- Fergus and Zeke and the field day challenge, Kate Messner ; illustrated by Heather Ross
- Solve this, forensics : super science and curious capers for the daring detective in you, Kate Messner and Anne Ruppert
- History Smashers, the Underground Railroad, Kate Messner and Gwendolyn Hooks
- Danger in Ancient Rome, Kate Messner ; illustrations by Kelley McMorris
- Christopher Columbus and the Taino people, Kate Messner and José Barreiro ; illustrated by Falynn Koch
- Disaster on the Titanic, Kate Messner ; illustrated by Kelley McMorris