In Haydn’s world, violinists can be treacherous. . .
In Haydn’s Vienna, rumors of a musical treasure draw out a killer. . .
A hostile royal’s friendly overtures make Haydn uneasy. . .
From psychic artist to art detective . . .
A psychic takes on the Gardner Museum heist. . .
Celine returns with fresh insights into the Gardner theft . . .
A murder in the opera theater forces Haydn to go backstage. . .