These books share similar themes with Lab Girl, by Hope Jahren
Non-Fiction
The Challenge for Africa, by Wangari Maathai
Forest Bathing: How Trees Can Help You Find Health and Happiness, by Qing Li
Hidden Figures, by Margot Lee Shetterly
The Hidden Forest, by Jon R. Luoma
The Hidden Life of Trees, by Peter Wohlleben (for another perspective, see this article from the Ecological Society of America)
The Nature Fix: Why Nature Makes us Happier, Healthier, and More Creative, by Florence Williams
Replenishing the Earth, by Wangari Maathai
The Sirens of Mars: Searching for Life on Another World, by Sarah Stewart Johnson
The Soul of an Octopus, by Sy Montgomery
The Story of More, by Hope Jahren
The Tree: A Natural History of What Trees Are, How They Live, and Why They Matter, by Colin Tudge
Unbowed: A Memoir, by Wangari Maathai
Fiction
The Man Who Planted Trees, by Jean Giono
The Overstory, by Richard Powers
Teen Nonfiction
Girls Who Looked Under Rocks: The Lives of Six Pioneering Naturalists, by Jeannine Atkins
Trailblazers: 33 Women in Science Who Changed the World, by Rachel Swaby
Women in Science: 50 Fearless Pioneers Who Changed the World, by Rachel Ignotofsky
Wonder Women: 25 Innovators, Inventors, and Trailblazers Who Changed History, by Sam Maggs
Teen Fiction
Counting by 7s, by Holly Goldberg Sloan
The Evolution of Calpurnia Tate, by Jacqueline Kelly
The Secret Garden, by Frances Hodgson Burnett
Youth Nonfiction
The Leaf Detective: How Margaret Lowman Uncovered Secrets in the Rainforest, by Heather Lang
Out of School and Into Nature: The Anna Comstock Story, by Suzanne Slade
Rachel Carson and Her Book That Changed the World, by Laurie Lawlor
The Tree Lady: The True Story of How One Tree-Loving Woman Changed a City Forever, by H. Joseph Hopkins
Wangari Maathai: The Woman Who Planted Millions of Trees, by Franck Prevot
Youth Fiction
Growing Trees, by Judith Bauer Stamper
The Lorax, by Dr. Seuss
Maple, by Lori Nichols
We Planted a Tree, by Diane E. Muldrow
Who Will Plant a Tree?, by Jerry Pallotta