I have been accumulating a physical library for a long time. Amazon has been a boon. I have been buying second hand books for as little as £2.81. I've also found some crackers in charity shops.
I'm wondering about e-books though. Amazon Kindle books could be a problem as Kindle owners don't actually 'own' the books it's a sort of permanent lease type agreement you pay once and have it forever but it's not your book. Amazon can at any time revoke your agreement and take back their books! As such I'm wondering whether we would still actually have access to those books post TU.

Something worth investigating.
So as a result of that I have never actually bought any useful books for my Kindle. I have some free ones but that's it. My Kindle is however a repository for my PDF library.