The Audience

I want to have a vague age range, and for two groups of people: younger adults and people who grew up in the 60's. I want to reach out to people who grew up in the sixties, as the style of my book will be 60's inspired, and will look as if it was made in the 60's, so this group will recognise that (hopefully). I also want to reach out to younger adults, as it's an informative reading piece and it'll be an interactive online book which appeals to this group. I think the book as great cross between old and new, which is why I have two groups.

Making my product accessible is important, as I don't want to make my product only available for certain people. I was using Helvetica for the font in my book, however, after some research Arial and Georgia seem to be preferred fonts, and older people prefer 14 point size font. Because of this, I am changing some of my fonts, but I am sticking to my 16 point size as I want the text to be slightly larger than normal books. This is to help people with dyslexia and reading issues, and the sans-serif fonts will help with that, too.
Source: http://www.awaionline.com/2011/10/the-best-fonts-to-use-in-print-online-and-email/

I believe my product is tuned for my audience(s), as there are things about it that people will like (the interactivity, the style, the context). However, if there was one thing I am worried about it making it all flow, and writing about the 60's to people who lived in that era.