Reddit reviews Warrior Police: Rolling with America's Military Police in the World's Trouble Spots

There are very few books on MPs and what they have been doing over the last decade.... One that I would check out if I were you is called "Warrior Police" (this one)

But basically MP Officers have a ton of responsibility. They take on a lot from a younger age than most other branches because they are a smaller branch. Company commanders might be regularly briefing generals on the security issues at their installation. I know that they are spread thin on deployments as well because they will not only be in charge of security for entire bases or FOBs, but they will also be in charge of training local police, and will have other operational duties like patrolling, conducting cordon and searches, being QRFs for maneuver units, convoy escorting, and a whole slew of other things.

From the MPs I have talked to, you (as an officer) can be as involved as you want to. You can go on all the patrols, you will fire your weapon in anger, all the crap that you want to do... But you can also choose to be an office guy... The biggest difference between MPs and most other branches is that you have a job in garrison as well, whereas Infantry or Armor guys train while in garrison. MPs patrol the roads, and supplement gate security at all installations. They handle prisoner transfers and are responsible for keeping order.

I am not an MP, but that is what I am hoping for. I commission in August, and that is my number 1.

Oh, and unless any of your cadre are MPs or Engineers, they are most likely going to give you crap for wanting to be an MP... You will hear stuff like, "So you hate soldiers?" and all that kind of stupid crap. Its all in fun most of the time, but don't seek advice about MPs from guys like that haha...