I had someone message me on Flickr about using one of my photos in a book on Ferraris. "If you grant me the possibility to cite your references (company name, address, website, email…) in the "Photo credits" space, I would be pleased to send you a copy of my book.
The publication of the book is planned at the end of the year on 2016, at the beginning of year 2017."

Should I say yes?