A_New_Hope said:
“The only way [to successfully remove iBook DRM using iTunes 10.5.3 and Requiem 3.3.6] is by using an iPhone, iPad or iPod with (iOS 5.1.1) or earlier to synchronize your desired eBooks and retrieve valid keys.”
...
HanDuet does raise some interesting questions in the possibly of exploring downgrading to iOS 5.1.1
Indeed, so you all just let me know if we need someone to downgrade their iOS device to iOS 5.1.1, and I'll attempt to do so with my iPhone 4S at that time. I follow this thread pretty regularly, but if you all want me to try this and you don't hear back from me quickly, just shoot me a PM so I'll get an email notification.