Easy marks

By Carolyn Keene

Subjects: Computers -- Fiction, Fiction, Computer crimes -- Fiction, Schools -- Fiction, Computers -- Juvenile fiction, Schools -- Juvenile fiction, Computers, Computer crimes, Mystery and detective stories, Detective and mystery stories, Computer crimes -- Juvenile fiction, Schools

Description: Nancy goes undercover to investigate a grade-changing scheme at Brewster Academy. Someone has penetrated the school's computer and is extorting cash from students in exchange for upgrading their academic records.