You can find them lots of places. The first place I'd go would be the library. Many of them have older, out of print books. There are also special out of print stores, so you can check your phone book. A while ago I wanted a book that went out of print about twenty years ago and I found it on a web site. There are lots of those that can find them for you too.
Old books about basic programming can be found in libraries. One will find many good old books for programming in libraries of colleges or universities.
Old chicago
Some books
Old gun magazines, the library, the internet, old books.
You can find old dictionaries online through websites like Project Gutenberg, Internet Archive, or Google Books. These platforms offer a wide range of digitized books, including old dictionaries that you can access for free.
Old catalogs, old gun books.
You would usually find illuminated letters on old story books.
The two books in the Old Testament, namedafter ladies are Ruth and Esther.
You can find old phone books, reference books, newspapers, photos, and even death and birth certificates.
Do an Internet search for "Project Gutenberg". They publish lots of old books whose copyright has expired. You will find many great books among them.
The Beautiful Old Books Boutique can be found primarily on AbeBooks. It can also be downloaded on fannieeiootn, tabethaooo, and rosanaro. eBay and Amazon may also have it.
Cheap books for sale are always available in eBay. These are however often old and used books but can still be useful. Some outdoor markets also sell these books.