A thousand nails in a barn? Why is there a mess in the kitchen at midnight? Who is Molly Buford, anyway? Will the boys figure out why there are leeches in a firetruck? And does Dad have to give up blueberry cream pie forever? Weighty matters, to be sure, but not too hard for the Great Detective Agency! Join Jason and Andy as they try to solve these and other mysteries in Weighty Matters, the fifth in the Farm Mystery Series.