Is that a military thing? I ask because I've been around computers since the late '80s and learned to type on an actual typewriter before that and I've never come across it. Personally I find it quite jarring to read and comes across to me almost as if English isn't your first language or you're still not entirely sure how this "internet thing" works (I know that's not the case, of course!)
Not intended to be a personal criticism, though - we've all got our little quirks and ways of doing things which don't always match up with what everyone else things is "best", but in my line of work good, clear communication is vital and I'd get pulled up on it pretty quickly if I strayed too far from the commonly accepted usage and rules of English language & grammar.
On something closer to the original topic though, the quality of those "World's ____ Guns" books can be extremely variable in my experience. Well-meaning friends sometimes get them for me as presents and while I appreciate the thought, they're often pretty samey. I find they're good for people who are new to shooting or collecting as a jumping-off point, though - especially if they have good photos and are written by people who know what they're talking about.