* series does not deal with calcd_rating... 
	(on edit could, recalc as a catch-all, and obviously if we change a single book's rating, we should re-calc)
* alter a condition, covertype, etc. and its not in drop-down list (even though db look via index is correct, e.g books.html shows updated covertype)
* book form is not validating (year published)
* add/remove authors, and after save they are ordered by author.id, not order of addition (prob. needs book_author_link to have an auth_num)
* show books, only shows first author