Trying to stop a feud between her two best friends when a locket disappears, Nancy investigates the origins of her only clue--a messy peanut butter, mustard, ketchup, and relish sandwich.

שם הספר
The clue in the crumbling wall - NANCY DREW MYSTERY STORIES #
Secrets can kill - 1 ; THE NANCY DREW FILES #
Deadly intent - 2 ; THE NANCY DREW FILES #
Murder on ice - 3 ; THE NANCY DREW FILES #
Smile and say murder - 4 ; THE NANCY DREW FILES #