"Brannen's art is as captivating as the information it illuminates... the illustrations are not only incredibly enjoyable, they're accurate and informative. Summertime Sleepers is a gem that should spark children's interest in science, in the world around them and in the joy of learning." - Shelf Awareness, starred review

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"Brannen's pleasing illustrations, both sketches and watercolor scenes, enable the audience to envision the animals within their habitats. An attractive science book on an uncommon but interesting topic." - Booklist

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"A well-crafted and attractive text for animal fans, and a suitable introduction to the scientific concept of estivation... Gentle watercolor scenes include a small black-and-white page that resembles a guidebook entry."

- School Library Journal

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"Budding biologists will especially appreciate this intriguing primer on a lesser-known process." - Publisher's Weekly

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"The book gives a large amount of information which is easily taken in and digested through the different elements of the text and illustrations... young readers are in for an empowering, engaging, informative treat!" - Illinois News-Gazette