LilyLC, All seems to have come to a conclusion this afternoon.
It seems that when I create individual pages, make PDFs of them and then merge them with PDF merge, what's happening is that the fonts are being embeded with each page. Apparently the RIP gets confused with all the fonts embeded and substitutes courier.
The printer recommends that I save the entire book as one document, and convert that document into one PDF file, thereby, embending the fonts once.
They guarantee that the book will print properly if I follow the above.
I had been reading through the printers vast instructions and noticed the paragraph relating to this problem, and they confirmed it.
They sent me a print out of the fonts embeded in my book and the 2 fonts were repeated for each page, 32 times.
I called Quark about a distiller (whatever that is) and the Custom and Roman encoding. Their answer was that none of it was Quark related. I would have to speak to Adobe.
I was made to understand that the only reason I would need a distiller is if I had postscript files to convert into PDFs. Since I was generating PDFs directly there was no need for the distiller.
I don't know how they print these books, other than the covers print RGB and the inside in CMYK. I always convert the CMYK photos.
I've been satisfied with the quality of their printing and the people, that's why I went through all the trouble to solve the problem.
I enjoy writing books for my 2 grandchildren. I've done 8 books in the past year.
You've been a big help, in that you persevered and explained in easy to understand language.
Again, thanks for all your help and to Limnos who made the original suggestion. I guess you can go back to enjoying the rest of the summer.
I will now make some reference notes for the future use.
If, by any chance this doesn't work out I'll will be posting back for additional help.