Coming from a 3rd generation medical family (and around your dad's age myself) I recommend
"The Art and Science of Low Carbohydrate Living" by Jess Voltek, PhD, RD and Stephen Phinney, MD, PhD
"Wheat Belly " Dr. W. Davis MD (Cardiologist)
I love Listening to podcasts. You get such a better feel for the individuals and their beliefs.
GCBC /Taubes, is excellent, but as mentioned a dense read even for some one with time. I do however think it is the one book that has the most immediate and profound impact on one's beliefs about diet and breaking down the status quo..and after several chapters you can gain a fair amount by skimming/speed reading and coming back later to get the details.
I would keep it clean and simple and non paleo for the introduction and background.
You want a clean approach.
There are also many excellent" podcasts which can be downloaded or streamed at
5: Ketosis: Devil or Angel?’ | Mark Sisson [excellent and every Paleo person should listen]
4: ‘How To Improve Cardio-Metabolic Health’ | Dr. Fred Pescatore
3: ‘Healthy Whole Grains?’ | Dr. William Davis [another must listen]
2: ‘All Things Leptin (Leptin 101)’ | Dr. Ron Rosedale [and another]
1: ‘Weight Loss Obstacles’ | Jackie Eberstein