Publishing Pictures?

I received an e-mail the other day from a man named Gajic. He wrote that he works for a company that produces date books that are themed around one particular country. He had seen some of my pictures on flickr, and asked to possibly use them in a date book he is producing around Macedonia. I looked into it to make sure that it was legitimate, and it appears to be. I told him he could use the pictures he was interested in for his date book. I may have some pictures printed in a date book! I put the pictures below.