“The Flip Side is a truly sinister place, with labyrinthine cityscapes and apocalyptic colors. Details, such as the grotesque body of the shape-shifting monster, which is born of negative emotions, effectively convey the nightmarish tone, and bold black lines enhance the well-paced action. The intriguing premise and striking visual representation convey lessons about depression and grief. Imaginative horror meets honesty about emotional pain.”—Kirkus Reviews
“This emotionally resonant graphic novel depicts vulnerable, bittersweet friendship against the backdrop of a high-concept, speculative premise. Walz balances heavy ruminations on death and mental illness with a tragicomic tone and earnest intention.”—Publishers Weekly
“Walz transcends the already top-notch adventure story and gives readers something more profound, more accessible, and more relevant. This makes for a riveting, heartfelt ride.”—Booklist, starred review
“Color is as much a part of the storytelling as the text, with muted panels showing Theo’s real world and memories before his friend died contrasting sharply with garish reds, blues, and yellows reminiscent of bruising that create the saturated, sometimes visually overwhelming flipped world.”—The Bulletin of the Center for Children’s Books