That's the same book. Anyone with any attention to detail can see that. Maybe I couldn't give the book an accurate grade, but I can see the spine ticks are in the same exact place.
Although I have not been accused of any wrongdoing online that I had to defend myself against, I do understand how infuriating it would be to have my name dragged through the mud for something I didn't do. Because of that, I wouldn't be first to run your name through the mud or call you a thief. If you still have the pressed 8.5 you could clear this up right now by posting a photo of the slab and a sign indicating the date and time.
I have to say though, your claim that these are different books (when they obviously are not) combined with the problems you have had in the past as well as your accusers being honest members of the boards has me siding with them on the issue.
+1