DK Life Stories: Ada Lovelace; Helen Keller; Harriet Tubman

JR MORTIMER is a frequent writer for National Geographic Kids magazine. NANCY CASTALDO is a contributing writer for National Geographic kids books. MATT BELLACE, Ph.D., has been a youth motivational speaker and stand-up comedian since 1995. Dr. Bellace has a Ph.D. in clinical psychology (subspeciality in neuropsychology), is a member of the National Speakers Association and the author of the book, A Better High. His “How to Get High Naturally” program encourages over a hundred thousand students a year to make healthy choices. Matt was a recurring comedian on truTV’s “World’s Dumbest.” His stand up can be heard – and requested – on Sirius XM’s Comedy Channels.

Libby Romero was a journalist and a teacher before becoming an author. Her books include the biography Ibn al-Haytham: The Man Who Discovered How We See, as well as teacher guides, interactive whiteboards, and a variety of other materials, including National Geographic’s Explorer magazines and the Smithsonian Institution’s TweenTribune. Libby is the author of DK Life Stories: Helen Keller and DK Life Stories: Jane Goodall.Charlotte Ager is the illustrator on all the Life Stories titles. Her work has appeared in The New York Times as well as in Season and Here magazines. She has also been featured on the Urban Outfitters blog. Charlotte lives in London.Charlotte Ager is the illustrator on all the Life Stories titles. Her work has appeared in The New York Times as well as in Season and Here magazines. She has also been featured on the Urban Outfitters blog. Charlotte lives in London.

Author Kitson Jazynka is an award-winning freelance writer and children’s author. Her work appears regularly in National Geographic Kids, American Girl, and Young Rider magazine, as well as the Washington Post’s KidsPost. Kitson currently lives with her family in Washington, DC.Literacy consultant Stephanie Laird is an instructional coach at Mitchellville Elementary in Mitchellville, Iowa, and is currently serving on the International Literacy Association’s (ILA) Board of Directors through 2019. She was the 2014 recipient of the ILA Technology and Literacy Award. Stephanie is the President-Elect of the Iowa Reading Association and was the 2017 Conference Chair of the Iowa Reading Association’s annual conference. Along with being an ambassador and advocate for education, literacy, and teacher leadership across her state, Stephanie was a member of ILA’s Literacy, eLearning, Communication, and Culture Committee and has contributed to the International Literacy Day Activity Kit, Literacy Daily, and ReadWriteThink.