moving a book:
	with book 6 of 11, and there is no book 7: see series (Wars of Light and Shadow)
		likely logic... if no bsl2, then just increase/decrease bsl1.book_num --> 
		(it would also break if we had say books 1-5 & 8 and tried to move 8 down to 7)

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)