The fundamental problem stems from the Author's name included as metadata in eBooks sold. The names are not provided as first and last names. So, if anyone wishes to sort book titles by author's last name, either find any eBook reader handling author's name with first and last names in separate fields or edit metadata of eBooks so that all authors' names start with last name first.
I think publishers should take care of this issue first and there is not much to blame any device manufacturers. Just a thought.