Coach Campbell’s 7 Defensive E-book bundles offer a tremendous amount of information on multiple defensive fronts and schemes. Each e-book offers full explanations and illustrations on defensive fronts, Stunts, Blitzes and Coverage's.

Coach Campbell leaves no stone unturned with his 9-e-Book bundle which includes the implementation of multiple offensive systems that represent over 2,000 combined pages of offensive systems.

How to Combine the 4.2.5 with the 3.3.5 Defense

The Complete Installation of the 3.3.5 or the 3.5.3 Stack Defense E-book

"How To Install an Option Attack Using Multiple Formations"

Ebook Installing the Multiple 4.2.5 Defense Installing the Multiple 4.2.5 Defense goes over how 4.2.5 defense is built around a basic 8-man front with 4 down linemen, 2 inside linebackers, 2 outside inverts, and a 3-deep secondary.