My Little Pony: Maretime Mysteries #3

Now that they've tracked down the mysterious object used to cast the spell over Maretime Bay, Misty and her friends take on the board game ghoul's next challenge: solve the riddle to uncover the object's origin and break the enchantment! But the sand that once filled the mischievous spirit's hourglass is running scary low... Can Misty, Sunny, Hitch, and Sparky find the place "where history's secrets hide and tales of old reside" and save their home when time is not on their side?!