Ask HN: Where to buy (DRM-free) ePub books?

This maybe https://www.vitalsource.com/products/waging-war-wayne-e-lee-... ?

There are endless websites that sell ebooks (ePub is only one format, you can easily switch between formats if you need), just google the name+ebook or epub

Baen Books (https://www.baen.com/) is a publisher that only releases DRM free ebooks. They primarily publish scifi / fantasy books that you can buy from their site directly.

Libreture maintains a list of DRM-Free bookstores: https://libreture.com/bookshops/

Have you checked the websites of the local bookstores in your country?

Many offer such things. Your local library may surprise you as well.

I use Amazon, then strip the DRM using Calibre + a plugin.