Title: The glass puzzle
Description: While spending the summer in Tenby, Wales, with their grandfather, American cousins Zoé and Ian assemble an old glass puzzle, inadvertently unleashing ancient forces that threaten the island and allowing them to travel into the past.
Subjects: Adventure and adventurers, Cousins, Fiction, Supernatural, History, Time travel, Juvenile fiction, Space and time, Adventure fiction, Paranormal fiction, Monsters
Places: Wales, Tenby (Wales)
Time periods: 1063-1284