“The cartoonlike, stylized illustrations are slightly reminiscent of the work of Henrik Drescher and Maira Kalman…. They are colorful with an emphasis on pastel hues. The book is well designed and has a creative use of typography and layout.”

– School Library Journal, August 1999

"Garcia's stylized cartoon illustrations are simple and spacious, with delicately drawn details and bright, varied patterns. Moonboy's changing feelings are written large enough on his moon face for younger children to follow, and he does win general acceptance at the end; consider this sweet alternative to Tomi Ungerer's Moon Man."

– Kirkus Reviews, June 15, 1999

“The art…commands interest. Old-fashioned cross-hatching combines with postmodern figures in an arresting mix of classic and contemporary styles. Tidy patterning contains the profusion of elements on each spread—they are busy but inviting.”

– Publishers Weekly, June 21, 1999

“Like most quality children’s literature, there is a lesson and there is a reward. The moral is smoothly worked into the entertaining story. Vivid illustrations and over-the-top behavior make Moonboy a pleasure for children and adults. And a touch of science fiction never hurt anyone.”

– Lisa DuMond, September 1999, SF Site, MEviews, 

"A story that most kids can relate to. Moonboy struggles to make friends, so he comes down to earth. Upon his arrival he notices that he does things very differently than the humans, but he keeps trying to connect by adapting to their behaviors and customs. But nothing seemed to help. Moonboy was still sad and alone. Everyone in town had their own pre-conceived notions about Moonboy; some quite outrageous. Then the question arose, 'But what's in your heart?' Then everything changed. A sweet story with many moral applications and talking points."

– Emily Lewis, Mrs. Mommy Booknerd's Book Reviews

“Bright, energetic illustrations attract adults and children alike in this story about overcoming differences and forging friendships.…Charming and whimsical, the vivid illustrations help make Moonboy a memorable read.”

– Publishers Group West, Spring 1999

“When Moonboy decides to visit Earth, he is excited about making new friends. But when the people of Poppygold see him, they run away. He looks very different and they are afraid. Only one person is brave enough to find out what Moonboy is really like, a boy named Ed Bread. When Ed finds out what’s inside Moonboy’s heart, he wants everyone else to see it, too. Moonboy is a wonderful story about going beyond appearances; written and illustrated by Carolyn Garcia.”

– The Reader’s Edge, June 1999