We did use some forms of braille in the army but it's a more simplified version to let you know if a battery is going in backwards. Or some such simple use as that.
I've made my own building up super glue or a dot of epoxy. Again, just for fast shit, like indexing fingers on a keyboard for example.
But the one blind guy I knew, even he didn't know braille! And I can tell you from experience that it's not as easy as you'd think. You sort of develop the skill to feel the individual dots with your fingers; for most of us it just feels like a jumble of protrusions. No individual dots perse. Kinda hard to understand but suffice to say it takes practice. If you aren't comfortable reading books like this normally, then I wouldn't try to incorporate it into anything life or death.