Told through dialogue, the narrative is a little one-note, though very entertaining, and the expressive illustrations bounce it happily along. Martín’s scribbly illustrations are reminiscent of Greg Pizzoli’s style.
Bovines and bedtime combine for delightful silliness. – Kirkus
As the cow returns to cause further challenges to sleeping, the girl's approach to problem-solving involves her father in a vivid test of imagination and possibilities. – Midwest Book Review
The cover is a good indication of the illustration style; pictures are bold and goofy, and the animals look just about as surprised as the father and the little girl about having company. Children who make up excuses to avoid putting their head on the pillow will giggle as the girl makes up more and more reasons why SHE can't go to bed. – YA Books