The S.O.S. Boys in... Mystery or Mischief

The S.O.S. Boys in... Mystery or Mischief is the fourth thrilling installment in the S.O.S. Boys Mystery Book Series. When Markie, the alien robot dog, prepares to return to the Markarian Galaxy, strange events start unfolding on Orcas Island. Is it the work of a Russian scientist studying the local hydrothermal vents, or is something more mysterious at play? As the boys investigate, they must figure out whether the alien presence is a friend or a foe before it’s too late. Packed with adventure and twists, this book will keep you on the edge of your seat!