Join Jennifer and Daniel as they journey through Dr. K's magical time portal, meeting famous historical figures and learning about important moments in history.
A chapter-book series for readers aged 8–12 that combines history, science and adventure. Illustrated by Emilie B. Nuñez and published by Palmetto Publishing.
Three new journeys through time are on the horizon. Join Dr. K, Jennifer, and Daniel as they meet extraordinary scientists and explore the discoveries that changed how we understand our universe and the natural world.
Book 7 · Dr. K's Portal Through Time
What if the stars could tell us how far away they are? Jennifer and Daniel journey with Dr. K to the Harvard College Observatory, where astronomer Henrietta Leavitt studies the changing brightness of Cepheid variable stars. Through careful observation, she uncovers a relationship that will help scientists measure vast distances across the universe.
Coming in 2027
Book 8 · Dr. K's Portal Through Time
Deep in the forests of Gombe, Jennifer and Daniel join Dr. K to discover the remarkable world of chimpanzees with Jane Goodall. They learn how patience and close observation revealed tool use, family bonds, and complex social behavior, while discovering why protecting wildlife and its habitat matters.
Coming in 2027
Book 9 · Dr. K's Portal Through Time
What happens inside an atom? Dr. K leads Jennifer and Daniel to meet physicist Niels Bohr and explore his revolutionary ideas about electrons and energy levels. As their adventure unfolds, they encounter the surprising beginnings of quantum physics and discover how scientific breakthroughs bring responsibilities as well as possibilities.
Coming in 2027
Part of the middle-grade STEM adventure series Dr. K's Portal Through Time · Release dates to be announced
A stormy night, a mysterious invitation, and the War of the Currents.
Curious, adventurous and always eager to learn. She has a natural fascination with the stars and often takes the lead in asking questions.
Jennifer's lively, imaginative younger brother. His enthusiasm, unexpected insights and humor bring a unique perspective to every journey.
The brilliant and enigmatic scientist who guides the children through time, making complex ideas accessible and exciting.
Jennifer and Daniel's grandfather, a retired engineer. He doesn't know about the time portal, but his stories spark the children's curiosity about science.
