[5y2SB]

..and this is exactly what I am attempting to avoid. Assuming an e-reader has a realistic life span of 3-4 years, both ADE and e-book vendors will have moved on and - as ever - Linux users will be on no ones mind.

Over the past days I contacted both PocketBook and inkBOOK in order to establish the compatibility of their products with the various library apps. PocketBook responded by saying that their products are sold with a number of pre-installed and that no new apps can be installed. => No e-book downloads via library apps possible. inkBOOK responded by saying that they have not tested any of those apps and that one ought to contact the app developer in order to establish compatibility with inkBOOK.

Over the past days, I installed both the OverDrive and 3M apps on my phone and I can tell you there is no way I would now go back to downloading e-books first to my laptop. PocketBook seems to be the dinosaur in the room with a very limited selection of pre-installed apps. Also, PocketBook users will not be able to benefit from future advancements related to PDF reflow technology (I recently trialled an Android PDF reader with reflow capability on my phone and the PDF image was displayed quite well), since the pre-installed PDF reader cannot be updated.
I can see why an e-reader manufacturer would want to push its own e-bookshop, however claiming to not have tested any of the public library apps does not inspire confidence.

So for me as a Linux user, the choice will fall on an "open" Android e-reader!