Yeah — the best one I’ve seen on the subject is the Complete Digital Photography Guide, by Ben Long… which seems to get into histograms pretty extensively. You can find it at http://www.amazon.com/Complete-Digital-Photography-Third/dp/1584503564.

But most of this information is also available on websites. The reading an RGB histogram is always open to interpretation. What you or I think makes the shot look good may differ dramatically… so the important thing to remember is that the histogram is not an indicator of a “good shot”. Instead, it’s an indicator of how much luminance is within the shot, and you decide if that’s good or bad for you, for the given subject matter.