One of my favorite STEM-themed picture book biographies is Hedy Lamarr’s Double Life: Hollywood Legend and Brilliant Inventor
by Laurie Wallmark and Katy Wu.
Here’s a brief description:
To her adoring public, Hedy Lamarr was a glamorous movie star, widely considered the most beautiful woman in the world. But in private, she was a brilliant inventor.
During World War II, Hedy collaborated with another inventor to develop an innovative technology called frequency hopping.