Every library I've had a library card for (Toronto Public Library 7ish years ago, and BANQ Montréal) have had O'reilly subscriptions for free! A few other people have mentioned it in this thread with specific cities, but check your local one! It seems really common.

Vancouver Public Library as well :) https://www.vpl.ca/digital-library/oreilly-technology-and-bu...

Though I wish I could check them out on my Kobo...