Eleven-year-old twins, Josh and Lizzie Parker, and their travel-blogging parents are off on a new adventure, this time to Nantucket Island off the coast of Cape Cod, Massachusetts. Aboard a ferry to the island, the twins meet Sara Coleman Clarke, or Grams, as her friends call her. Grams is desperate to boost her struggling family museum and has organized a Spyglass Spectacle gala to raise money for exciting improvements. Baxter Benedict, a long-time friend and famous collector, has finally agreed to allow the museum to display his most treasured item: a priceless antique spyglass that once belonged to Nantucket whaling captain, Reuben Coffin.

Suddenly, the spyglass turns up missing from its locked showcase. Mr. Benedict is furious at this unimaginable loss, and the future of the museum is in danger. With the Spyglass Spectacle just days away, will the twins, along with their new friend, Maya Benedict, be able to piece together a complex web of clues and recover the spyglass before it's lost forever?

Readers aged 8-12 years old will relish this exciting adventure-mystery set on Nantucket Island off the coast of Cape Cod. Strong characters and a plot filled with twists and turns will entice readers of every age, including reluctant readers, parents, and educators.