Back in the day, you could get Linux distros with printed manuals. And more importantly, stickers!
RedHat is well known for printed manuals, but SuSE Linux also did this. I still have some of them on my book shelf. SuSE was shockingly inexpensive, given the high quality documentation and packaging.
I picked up Red Hat 5.2 at Best Buy like this. As a high school kid with little money it was like Christmas to find something so heavy and packed with software for like $30. Had a lot of fun with it at the time.
Also that looking through the manual at things you already (think you) know, you learn a lot.
There was a time when all OS's did this. I had a DOS binder, from which I learned 80x86 Assembler from the Debug chapter. And since I grew up on QNX, I managed to score myself a set of QNX manuals that are actually still on my shelf today because its such an interesting OS.
Nowadays we're paperless. The info is all still there. Just not as beautifully presented.
