I was excited when I read this request because I have read some outstanding biographies lately!
One is THE TREE LADY, by H. Joseph Hopkins and Jill McElmurry. It's about Kate Sessions a woman who changed San Diego forever, by having a passion for trees/plants and planting. It's wonderful. I read it to my six-year-old and she was so inspired, she started dancing around the room declaring she would turn our apartment into a jungle!
Another fabulous one, is ME... JANE. It's deceptively simply but oh-so-wonderful. It's about Jane Goodall, the chimpanzee researcher.
Oh, and MRS HARKNESS AND THE PANDA Alicia Potter, Melissa Sweet). Another one about a woman going against the odds, and animals. Beautiful and funny, touching, lovely.
I also love the two about Jacques Cousteau. There's MANFISH, illustrated by Eric Puybaret; and also THE FANTASTIC UNDERWATER LIFE OF JACQUES COUSTEAU, by Dan Yaccarino.
I hope you enjoy these. I adore them!