Thanks to the Ellen Klages middle grade novel Out of Left Field, I already had a rudimentary knowledge of the lives of Mamie "Peanut" Johnson, Toni Stone, and Connie Morgan. Even so, this picture book focuses its attention squarely on Johnson alone from childhood to an Afterword that talks about the many honors she received late in life. Leah Henderson is having quite the year herself! Between this and The Magic in Changing Your Stars, she's cranking out some high quality fiction and nonfiction alike. There were a number of things I liked about this book, including the ways in which Henderson eschews faux dialogue and has this extensive list of Source Notes with direct quotes, as well as a Select Bibliography for consideration. The illustrator, George Doutsiopoulos, is Greek and insofar as I can tell this may be his first book published here in the States. He better keep at it, because there's a twinkle in Mamie's eyes in this book that's difficult to capture in illustration. This isn't the first picture book bio of a Black woman in baseball, but it's certainly one of the best you'll find. In a league of its own.