-- Yes, having the military experience can give you an edge depedning on the department BUT it doesn't guarentee you'll be hired.
-- Going to college will certainly be a plus. Even though there are a significant number of departments who may only require a HS diploma or GED, college credit hours and/or having a degree can help a lot. Remember, again depending upon the department you apply with, it can be a very competitive process.
-- You are correct, there are a variety of "self-help" books one can buy at a book store or check out from a library. Off the top of my head, CLIFF'S and ARCO come to mind. I have heard some say the books don't help much and I have had others say these types of books do help. It's up to you though to determine whether or not you want to buy the books. In my opinion, I think a serious candidate should try and take advantage of any and all resources you can get your hands on. Again, DEPENDING UPON THE DEPARTMENT, it can be a very competitive process.
-- Finally, I'd check with the department or departments you have interest in to determine if they have any suggestions. Some departments do offer study guide materials.
--
Charlie
"Good and evil are present in this world, and between the two there can be no compromise" - President George W. Bush, in his farewell address to the nation.