Some books show the bps as well as the strum pattern, most don't. It can be tough trying to find the rythmn for a piece you have never heard. Your best bet is to see if you can find the tune with
guitarpro or powertab so that you can hear the rythmn. The time signature gives you the basic rythmn. 4/4 or 3/4 for instance, but won't help you with the feel of the song. If your not concerned with accuracy, you can always make up your own strum pattern with what sounds good to you. You can slow down or speed up the time also to put your own feel on tune. Hope that helps