The settings definitely already
are preserved, Wyndham. You are doing something in a non-standard way -- I believe that your switching to "publisher settings" keeps resetting the settings for you.
Normal procedure in Marvin is:
- open your 1st book, adjust settings
- close the 1st book -- all settings in it will remain sticky forever!
- open your 2nd book -- all settings* from the 1st book are automatically applied to the second book!
- the same is true of the 3rd, 4th, 5th, 6th new book... Each of them will automatically adopt the settings active in the most recent previously opened book.
I believe that your fiddling with "publisher settings" may be disrupting this work-flow.
* with a single exception: paragraph spacing is always reset to publisher default