Easy marks

By Carolyn Keene

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

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.