“Kleven’s joyous art is instantly recognizable to her readers. Her colorful palette and use of movement and fantastical detail make her stories page turning reads…A lovely addition to elementary library shelves.” — School Library Journal

“Outstanding. The slightly surreal tale of a monkey, a hat, and a robin through different seasons is bolstered by delicately beautiful collage art in colors that evoke harsh, snowy winters and lush, blooming springs. A page of back matter is dedicated to fun facts about snow monkeys. The lyrical prose makes for an engaging storytime or bedtime option.” — Association of Children’s Librarians

“Gently whimsical…Mixed-media collage illustrations show sweet-faced monkeys at play in richly textural landscapes. Through Hiro, Kleven sympathetically illustrates young children’s ability to find emotional connections to inanimate objects, and the creative ways they can respond to stress.” — Publishers Weekly

"Children (and adults!) will want to climb right inside the joyful, cozy world of this exquisite book. The warm playfulness and gentle drama of the story together with the myriad tiny details to savor in the artwork all speak directly to children's hearts." — Kimberly Faurot, Children's Librarian

“Hiro's Hats is a complete gem! There's so much beauty, action, and contemplation, too. The way the characters interact with each other feels real and extremely touching. I want to pick up Hiro and cuddle him.” — Elissa Haden Guest, Author and Teacher of Writing for Children