Marvel's Greatest Comics # 32 - To Save You, Why Must I Kill You?

Reprinting Fantastic Four #41 and #42

The Betrayal of Ben Grimm:

The Frightful Four have returned once again to do battle with the Fantastic Four, but this time they have an ace up their sleeve: The WIngless Wizard has devised a deadly new weapon- the ID MACHINE, a brainwashing device, that they have used on poor Ben, now a fighting mad member of the Frightful Four!

To Save You, Why Must I Kill You?

The battle between the Fantastic Four and The Frightful Four-plus Ben- continue, with Human Torch pretending to be hypnotized, too, so he can infiltrate the Frightful Four camp and find out just what's going on!