Softcover book

I am in the process of having a small test print made of my book--photos in color and black and white. I'm creating a softcover. I am allowing several photos to overlap the two page spread. Will I need to add a 1/8 inch bleed of white at the ends of the pages towards the gutter so that I will not loose much image information? Or will the book (if perfect bound) lie relatively flat?

Thanks in advance.

Groups Beta