I have a tablet I carry in my purse for that same reason. It's thin & light, it holds a lot of 'books' (so no matter what the taste is for that day), and best of all - I can read one handed when eating - as you only need a finger to change the page! I eat out a lot by myself, so reading is easy - oh - and with a tablet - doesn't matter that the restaurant is dark! (or that you are waiting in the movie theater for half an hour!)

Mine is a Samsung tablet - but a kindle is basically the same idea. I still love actual books, and I get a lot of them. But I get online ebooks too always watching for sales and promotions. Often when in a series, the first ebook will go on sale or be free when the the next ebook comes out.