Let me add to the chorus: I can (and DO) cram literally 1000s of ebooks (in inefficient PDF format, yet) on my cell phone, FFS. THE FULL BOOKS for free, beyond the purchase of a decent PDF reader for Android (“ezPDF Reader”); yeah, summarize this {rude gesture}…
Thank heavens Gigapedia still exists (under a different name at a different URL ^^’). If you know of what I speak and want a link, PM me, most especially if you’re a student; textbooks are expensive.