2-8 Images in each set
then an Aperture book will not help - the books need to have 20 pages at least. You will have to remove the empty pages.
I'd try to use iBook Author. It can also export the finished book as pdf, or make the book with keynote.
Or use the webpages or web journals. Then your friends/clients will only have to load the index page in their web browser and can browser the sets with all annotations. Only the basic themes are a bit boring. I installed Themes for Aperture to get a better design.