Rather than review a specific book today, I thought it might be useful to go through my library and pick out a set of 5 general-purpose books that would make a good foundation for a firearms reference library. Specifically, books that cover a lot of ground, have at least a decent amount of detail, and are readily and inexpensively available. Not the general "A History of Guns" junk, but properly useful books.

Here are the five I came up with:

The World's Assault Rifles:
https://amzn.to/3teENHb

Handguns of the World:
https://amzn.to/3z93RTI

Flayderman's Guide:
https://amzn.to/3MdJIi0

Small Arms of the World:
https://amzn.to/3Q01nNx

Cartridges of the World:
https://amzn.to/3NPGuTk