Re: Urban Sniping
You might check out the Army Marksmanship Units. "Counter Sniper Guide".
It's old but still useful. Lot's of people don't like it because it doesn't deal with the fancy tricked out gimmick stuff many "tactical" people like.
It's practical, it make since. It also doen't cover the fundamentals as they indicate in the guide, there are plenty of marksmanship fundamental books out there.
It's simple, designed for LE. Tells you how to pick a rifle, glass, etc., and how to practice for LE Counter Sniper operations. You'd be supprised what they recommend for training but if you know anything about LE Counter Sniping, and take a honest look at it, you'll see they are right.
The AMU trained a lot of cops in sniping/counter sniping, including the FBI before they got their own program started.
Don't read it if you are wanting something to justify your fancy tricked out tacticool set up.