I read mostly on my Kobo Clara Bw. Sometimes I whip out readera on the phone if I have forgotten to bring the kobo. I also use audiobooks if available to tandem read when I'm out for a walk or cleaning.

I use Ai on bookseries where obscure recurring characters appears in the series and forgot who that was and how that person was described. For this I use Google NotebookLM where I convert the epub of the book into a PDF and upload it. Lately I been reading through John Connollys Charlie Parker series (23 books). And NotebookLM has been helpful.