Ruth Spiro is the author of the Baby Loves Science series, published by Charlesbridge. Titles include Baby Loves Quarks, Baby Loves Aerospace Engineering, and Baby Loves Quantum Physics, all named by Amazon editors "Best Children's Books of the Year" for ages 0-2. Additional books in this series are Baby Loves Thermodynamics, Baby Loves Gravity, Baby Loves Coding, Baby Loves Structural Engineering, Baby Loves Green Energy and the Baby Loves the Five Senses collection. These books are illustrated by Irene Chan.

The "Baby Loves" family also includes the Baby Loves Political Science collection: Democracy, Justice, Congress and The Presidency. These books are illustrated by Greg Paprocki.

Ruth's STEM-themed picture book series about a creative young "Maker" begins with Made by Maxine, published by Dial. The second book, Maxine and the Greatest Garden Ever, is forthcoming in 2021. The series is illustrated by Holly Hatam.

Ruth’s debut picture book, Lester Fizz, Bubble-Gum Artist, won awards from Writer’s Digest and Willamette Writers, and was a Bank Street College of Education Best Book. Her writing has appeared in FamilyFun, CHILD, and The Writer, and also in popular anthologies, notably The Right Words at the Right Time (Vol. II), edited by Marlo Thomas, and several Chicken Soup for the Soul titles.

A frequent speaker at schools and conferences, Ruth’s previous appearances include the Los Angeles Times Festival of Books, Early Childhood STEM Conference, Chicago Tribune Printer’s Row Book Fair, Millennium Park Family Fun Festival, Illinois Young Authors Conference, Illinois Art Education Association and the Virginia Festival of the Book. She lives in Chicago.