Replace picture in Framemaker Bopk

[#1]

I have an image on the master page of every file in a framemaker book. How can I replace the image in all files all at once? 

[#2]

Did you add it by reference? If so, all you need to do is replace with the new image in the same place you linked to with the same file name.

[#3]

I do not think it was added by reference. I did not create the templates and I am not farmiliar with Framemaker. does any one know of any reference were someone could assist in a video call or or on the phone? 

[#4]

We've just changed logo, again … so I updated one file to reference the new graphic, created an object style (my first!) to set size and position. After that, I kept the updated file open, selected the other files in the book and used File > Import > Formats to update page layouts and object styles across the book. If you want to give this a try, start with backups ;-}

note: I didn't want just to update the referenced file, because the previous one had a datestamp in the name: not my choice.