The publisher is irrelevant. TALK TO THE PRINTER!!!!!~!
When you actually make a book, you create a PDF file using the PPD for the EXACT PRINTING PRESS the printer is going to use. They have a layout program that takes the PDF pages and arrays them on larger sheets for double sided printing, folding and trimming into the actual assembled book.
Based in the overall resolution and screened separations for four color printing [probably requiring 300 dpi files, as we all know] your overall book will be 300dpi regardless of your source image resolution.
If there's going to be a special section using your high resolution files with extra smooth [probably synthetic] paper, then you can talk to them about 1200 dpi. once they stop laughing.
Dwight Atkinson