My future son-in-law (another gun lover) gave me a book for Father's Day. It is Complete Encyclopedia Of Pistols & Revolvers, by A. E. Hartnik. It's a fairly small book, which a few reviews on Amazon has called a coffee table book, but I would say it was simply a very well illustrated reference book for those of us that love pistols and revolvers. While I know the major handguns out there, sometimes I want to see what a particular model looks like or what the specifications are on it. Ever since getting this little book, which I keep on my desk, I can look it up quickly and see a high quality photo (slick, glossy pages) along with it's technical specifications. There are also several chapters on safety systems, locking systems, ammunition, and exploded drawings on some of the more common firearms.
If you are interested in something like this, you might thumb through one at your local bookstore. It is well worth the $20 cover price, even if you don't get it as a gift.
Here's an Amazon link to this particular book. Based on Bud's reviewing system, this book is a 5