Clanton’s simple story broaches common anxieties that come with being new, and he buoys it with a positive message of inclusion. His amiable illustrations, rendered in ink, pencil, watercolors, and “digital magic,” will further allay children’s fears...A welcome, and welcoming, read.
—Booklist

Boo and his new pals are all expressive, especially the enthusiastic Rex. A great example for both new kids and those welcoming them—at Halloween or for the rest of the year.
—Kirkus Reviews

The ink, pencil, and watercolor illustrations capture Boo’s evolution from shy and tentative to happy and confident, often with just the tilt of an eyebrow or the crumple or curve of a mouth...The text is as brief as can be, augmented with often-humorous dialogue and sound effects, comics-style—making this winsome picture book suitable for preschoolers and emerging readers alike.
—The Horn Book

Clanton’s illustrations deftly depict the action and facial expressions of his cartoon characters. Who knew the awkwardness of a failed game could be shown so simply and yet so well? Clanton addresses one of life’s difficult experiences for all ages in this humorous book. There’s a built-in fan base from previous titles, but this is also a great title to entice newcomers to the series.
—School Library Journal