Just One Oak: What a Single Tree Can Be

“A joyous tribute to the many roles one living tree can take—from creating a microclimate to feeding and housing a wide variety of wild creatures. … Offers plenty of cause to root for this keystone species.”–Kirkus

★ “Gianferrari and Sudyka (Fungi Grow, rev. 9/23) explore the many life forms and natural processes—both visible and invisible to the naked eye—that a single oak tree ‘nurtures and nourishes.’ From feeding and sheltering wildlife above – and below ground to producing oxygen and preventing soil erosion, and beyond, the oak touches everything around it, forming a micro-ecosystem of its own. Gianferrari’s text, with its frequent alliteration, occasional rhyme, and refrain of ‘just one oak,’ constitutes an ode to the ‘beautiful and bountiful’ tree’s life-giving power.”–Horn Book Magazine (March/April 2026)

★”In a richly illustrated picture book that’s chock-full of ecological facts, Gianferrari (Rain and the Reading Horse) and Sudyka (Angela’s Glacier) venerate the astounding oak for its critical role as a keystone species. Employing anaphora, assonant lines highlight the many varied roles a single tree plays for a multitude of species across the seasons: ‘Just one oak…/ from the tip/ of its crown/ down to the ground,/ with roots all around,/ sustains so very/ many creatures.’ … It’s a satisfyingly comprehensive and appreciative portrait of oaks and their numerous contributions. Back matter provides further information.”–Publisher’s Weekly

★”Many readers think of animals when they hear the term keystone species, but this book spreads the word about how the hard-working oak tree also serves as a keystone in its environment. Lyrical descriptions of main points introduce each spread, such as how the oak tree shelters insects through the winter. Then more technical details, like ‘overwintering insects are food sources for predatory spiders and songbirds,’ appear in smaller font at the bottom of the scene. Paintings show the variety of life that depends on the oak, from white-tailed deer and black bears to field mice and fungi. Nearly everything is labeled for easy identification. Some images show the entire tree and its surroundings, while others zoom in for a closer look at leaf litter or the insects that create homes in acorns. Extensive back matter includes more information about oak leaves and acorns, how to grow oak trees, a diagram of the oak tree’s life cycle, a source list, suggested further reading, and a list of additional sources and websites.

VERDICT Highly recommended for the layered text and intricate illustrations that make this a wonderful read-aloud for younger grades, while offering plenty of information for budding botanists.”–School Library Journal

“In this arbor-centric work of children’s nonfiction, readers get to track the growth of a large oak tree through the seasons and are introduced to the various birds, animals, and insects that benefit from all the tree has to offer, from acorns to shelter to filtered air. Repeating the phrase “Just one oak” on each page, the text moves with a poetic cadence as it expounds upon all the interactions between the tree and its various denizens. Watercolors blend seamlessly between scenes of winter into spring, showcasing especially the rich soil that sustains the oak, while shifts in perspective demonstrate the stages of the oak’s life as the composition plays with foreground and background, giving the art a sense of dimension and fun. …”–Bulletin for the Center of Children’s Books