Here is an excerpt from the Copyright act of 1976:
Right to Publicity -
Famous people create a value in their name and appearance that is part of what they leave behind when they die. They have a right to control this value during their life -- that is why people pay celebrities so much for their "endorsements." State courts have generally ruled that the estates of famous people also have the right to control publicity about them after they die.
Make what you want of that.
I also would really look into the rights to the photo(s) on the cover. If you got it from a stock photography company, sometimes you get vastly different rights. There is a very good chance, you are not allowed to sell the image. I can't be 100% certain about this. I have a book of copyright laws at home, I will try to remember to look into it.
When I was in art school, we used to rip images off the internet, old stock catalogues, etc, bu I know when you are in school, and not selling the work, you are subject to a different set of laws.
If you have the images on a CD or in a book, there should be a terms of agreement somewhere that you may want to check.