set of five books from "The Hardy Boys Casefiles" series by Franklin W. Dixon. The titles included are:

Dead on Target (Book 1)

Evil, Inc. (Book 2)

Cult of Crime (Book 3)

The Lazarus Plot (Book 4)

Edge of Destruction (Book 5)

These books are part of a young adult mystery series featuring brothers Frank and Joe Hardy as they solve various crimes and mysteries. The series is known for its suspenseful plots and action-packed adventures.