I stopped in the mega alcohol warehouse today and was perusing the thousand beer selections and realized that I don't know squat about all the beers on the market today.
I was torn by the myriad of choices and ended up bringing home a St. Arnolds Lawnmower, which is pretty tasty.  I liked their Christmas beer so, I figured this may be good as well.
Back to the original question; what makes a bock beer different from a lager?

Google

Lucky Bock beer was pretty good.

What is the difference in Bock and Doppelbock ? I tried Ayinger's Celebrator Doppelbock once and really liked it.