Reading e-books on your GPS


I was looking for e-books reader for my wife. there are several options (Sony, etc) which allow you to read books, view pictures and listen to music.
It seems to me as a very easy feature to add to GPS, allowing you to have many books available for reading with you.
Has anyone know about GPS unit which support this functionality? (not audio books).
I searched internet and found several GPS from Chinese producers(and 1 from Australia) , but these are unknown brands.


Audio Books

Many units, Garmin for sure, have Audible Audio, and .mp3 play possible. You can play both types.

thanks ralphy1 ,but I'm

thanks ralphy1 ,but I'm looking for non-audio books. I want to read them by myself after the trip smile