The Mystery of the Silver Spider

The Mystery of the Silver Spider is a book in the Three Investigators series by Robert Arthur Jr.

Djaro is the soon-to-be ruler of the fictional European state of Varania, a country which is still very conscious of old traditions and fashions (around the 17th to 19th century).

An important role in the plot is played by the title's Silver Spider, a piece of jewelry which is the most treasured item of Varanian history (comparable to the English Crown Jewels).

Soon, the Investigators find themselves actively involved, as the conspirators—headed by Duke Stefan, an ambitious nobleman and interim ruler of Varania—attempt to frame them for stealing the Spider, and by implication sully the name of Prince Djaro and endanger his coronation.

Despite the fact that all seems hopeless, they finally prevail when Jupe recalls an important piece of Varanian history, which allows them to alert and rally Varania's loyal citizenry.