I still have a copy of a TI TTL Data Book, completely useless these days with the internet, LVCMOS everywhere, all in one microcontrollers and FPGAs, but it's still cool to flip through every so often.
I have the same book and it gets used regularly. Surprisingly not everything involves gate arrays and microprocessors.
I know, completely useless is an exaggeration. I just find it much more convenient to pull up a searchable/zoomable PDF vs flipping through the book when I do need to check a specs of a 74/54 series chip.
My TTL book lives in the bathroom so I sort of agree :)