The Clue of the Velvet Mask by Carolyn Keene
The plot and story take place largely in Nancy's hometown of River Heights. Nancy tries to solve a mystery about a gang of event thieves robbing homes during parties, lectures, musicals, and other social occasions planned or catered by Lightner's Entertainment Company.
Table of Content
Chapter 1 A Suspicious Masquerader
Chapter 5 An Interrupted Party
Chapter 11 The Woman of Mystery