Covert or overt targeting

I wonder what is different about digital photography for the over and under-50s?

Once I receive a copy of the book I will tell you. I assume that the author perceives the difference will be in the level of technical knowledge and experience of the older person.

The marketing of a book like this raises a fundamental question. Do I take a covert or overt way of declaring that this is an oldies book? My advice would be to take the covert approach – something like digital photography for the digital novice. Dick Stroud