Same here. Lost ~44 pounds without exercising. I just take a 10-15 minute walk 3-4 times a week and removed most of the processed foods from the diet, no meat, no eggs, very low sugar, became a vegetarian. So most of the impact came from changing my diet and not merely from exercising.
Good books on diet:
In Defense of Food, Michael Pollan
What To Eat, Marion Nestle
Eat, Drink and Be Healthy, Walter Willett
Mindless Eating, Brian Wansink
Why We Get Fat, Gary Taubes