The Mystery at Oak Island Puzzle BookBy M. C. Tillson and Lisa BaileyCape Fear’s Oak Island has lots of secrets and plenty of puzzles. Try your hand at doing word searches, crosswords, Sudoku, and other activities. The Mystery at Oak Island Puzzle BookBy M. C. Tillson and Lisa BaileyCape Fear’s Oak Island has lots of secrets and plenty of puzzles. Try your hand at doing word searches, crosswords, Sudoku, and other activities.