Megan and Will McCulloch dig up trouble when Lassie tracks down an ancient Indian burial ground! With a team of bad guys hot on their trail, the kids find themselves trapped in an adventure more dangerous than they'd ever imagined. Now it's up to Lassie to make a daring rescue - and save Megan and Will from the hands of thieves...
Used availability for Nancy Krulik's Digging Up Danger
December 1989 : USA Mass Market Paperback