If

David J. Smith is a teacher and educational consultant with over 25 years of experience in the classroom and is the creator of the award-winning curriculum "Mapping the World by Heart." Steve Adams has collaborated with a wide range of publications, including the Wall Street Journal, the Chicago Tribune and the Globe and Mail. He has also illustrated eight children's books. He lives in Montreal, Quebec.

" ... this is one of those books school-age children can happily page through many times, and even adults may find themselves taking a second and third whirl.—The New York Times
This would be a fun book to book-talk to children in grades two to six.—Resource Links
The text serves as an excellent discussion starter and bridge to comprehending big concepts. A solid suggestion for fact-focused young readers.—School Library Journal
The best thing about If... is that it can be truly enjoyed by all ages. ... If... is also an excellent resource for teachers as it easily fits into Mathematics, Social Studies, History, and Geography at different grade levels.—CM Magazine
Smith, who employed the same kind of imaginative scaling down of ideas in his popular 2002 book, If the World Were a Village, does a great job making nearly incomprehensible concepts less so.—Quill & Quire
If this book were a pizza, young readers would gobble down every slice---and demand more for dessert.—Kirkus Reviews
... this is absorbing and informative.—Booklist