There is nothing worse than a granny with a grudge, especially when it involves ketchup, mayo, corn syrup and a book library drop box. For over a year the Ada County Community Library have been trying to catch the fiend who had been pouring an assortment of condiments into the drive up book drop off box and ruining books. Well, mystery is finally over. Joy Cassidy (75) was caught after a Boise police stakeout and sentenced to a month in jail. Seems her motive was revenge for how some senior cits had been treated by patrons and staff over the years.