A while back I was doing a lot of running, than I hurt my knees and had to stop for a while. I was really getting into it. Now I am doing more cardio on a home cardio machine, doing 1 hour in the AM and 1 hour in the pm. Now that I am doing that I have "cardio fever" or "endurance exercise fever", those are just terms I made up myself. For some reason I just feel better doing endurance based exercise like running, jogging, long distance walking. The point is I want to get back into running especially now since its getting colder out and there is nothing better than running outside in the cold. Looking for a begginers book on running so this time I don't hurt my knees. Even though I have arthritis in my knees I know I can still start running again. Any suggestions on books would be welcome. So any endurance guys out there know of good books on starting running with a good plan as not to destroy your knees...please post.