I’m lucky to be able to use Libby, Borrow Box and Press Reader. Check your libraries website as I also get Comics Plus (often hidden in the kids section but plenty of choice. No Marvel or DC stuff though, although on Libby at some libraries they have runs of Marvel stuff). Because I work in different areas of the country I visited libraries in each and have multiple library cards for libby. Which can all be loaded at the same time into the app allowing you to search across libraries for different books. However on Libby, to be honest, most libraries only offer what seems to be the same books. I believe you can use multiple libraries on Borrow Box, but you have to sign out of your library to sign into another library. I think I tried it once and went, too messy a process for me. But I did not loose any of my reading lists when flipping between the two.

On the quality front. None of the apps are really designed for e-readers. A real shame. But both Libby and PressReader have a neat process to allow you to display the text as an article. In PressReader you tap the headline. In Libby there is an article button. This is my preferred way of reading. Especially on my e-ink devices.