In the past I've occasionally had PDF docs printed at copy shops (spiral bound usually) - but that can work out surprisingly expensive.
You should try out a Remarkable and see if that works for you (it didn't for me but it was close). They don't have a lot of distractions and they're pretty good at displaying PDFs.
Currently I buy books and put up with them being a little behind the bleeding edge. Good ones are hard to find though.