Most (probably all) States have a tourism guide to encourage visitors to come and spend $$. For example, I did a search for "Michigan tourism", which came up with the Michigan's official travel and tourism site at
http://www.michigan.org/. Their current travel guide is for Winter 2014, but the Fall and Spring/Summer 2014 guides are also available from this
webpage. You can order a hard copy through the mail, or do your research using the online copy.
No reason to buy books with all the free info available.