Thanks, Malcolm ! I appreciate your help.
I have no way to compress except to reduce the quality in Photoshop, and thus the file size. I’ll explore further. Usually, for photo work, I use the largest file size possible for the best photo quality.
But, getting back to the original topic of the Canal Book, I think it’s a pretty good book - a lot of interesting info and photos of the tokens. I’ve already found and bought two - the Bristol Bridge Token and the Newark Castle and River Trent Token.