There used to be a copy of Osborne's "PET/CBM
Personal Computer Guide"
around here someplace, but I suspect my brother took it with him when he
moved out, even though he's a C64 man. (Darn!) I really need to find a
good shop with old computer books in it. All of the second-hand
bookstores I've been to specifically state that they don't keep computer
books or magazines older than 5 years (or so) old. :/
I've found that one of the best sources for old computer books and
magazines is often overlooked... the LIBRARY. Most public libraries have
a nice collection of books on old personal computers from the 1st wave of
PC popularity (early 80s). I know that my hometown (Austin, TX) has a
huge collection of books with titles like "6502 Assembly Projects" and
"1001 things to do with your PET". Plus, most libraries archive
magazines. My university has a full set of many computer magazines that
have been around since the 70s such as Byte.
However, if you're looking to own the books or magazines, this doesn't
help. But if you're just looking for info or wanting to get some kicks
by reading old stuff, your local public or university library is a great
place to start.