Worst Date: Greatest Challenge - Journey Home, #2

In book 2 of the Long Journey Home Series Hazel Lowe has come to Martha's Vineyard to visit her boyfriend Arthur. When he takes her to a childhood play place, a cave touched by sunlight on noon of the summer solstice, a swirling vortex throws them back 250 years! Mistaken for his own ancestor, he and Hazel are accepted by the islanders, but face a host of challenges. When he's lost in the sinking of a whaling ship, Hazel is on her own.
She must run their farm, deal with suitors, and then defend herself when a host of charges are brought against her. After discovering that the women of the island are making gunpowder and ammunition, she helps them to smuggle some of the supplies across to the mainland. Arthur is found there, and reveals the truth: troops will invade the island and slaughter the people in a few months! They formulate a plan: forge a letter from the governor to get Colonial troops dispatched to the island to protect them.
Can they implement the plan in time? Will they save their friends and family? Most importantly: can they get back to the cave at the next solstice and get home?