Child provides something rare and wonderful in middle-school fiction: the refusal to dumb down content, offering young readers a long book with multiple opportunities to learn something new (in this case, how to see in four dimensions). Long live Ruby Redfort!
—Booklist Online

The ingenious puzzles and humor, especially in dialogue among Ruby and her peers, remain highlights...Rewards await persistent readers: sly satire, quirky detail, and a smart, opinionated heroine brimming with ebullient self-esteem.
—Kirkus Reviews