The book is “Moral Theology” by Rev. Heribert Jone. I don’t find it difficult to read, but it’s not like reading most books. It’s a reference book aimed at priests first and then the laity. It requires a degree of intelligence and reading comprehension. Some things are pretty simple to follow, and some require some thought and deductive reasoning in order to apply the principles to your particular circumstances, but it’s not some abstract piece of philosophy. If you can use words like “arcane” you should be able to get through the book.
One thing you have to look out for is that the Canon Law is out of date and not correct (at least in the edition I have from 1951. The 1993 edition is probably accurate) and so some of the things on marriage aren’t correct, etc. Since faith and morals don’t change, that part is correct, and as a lay person it’s all I really care about. The other stuff is just interesting to read. I especially like that it explains the Sacrament of Penance and what information the priest needs to know to make proper judgements in order to give absolution and what have you.
Tonight was my first confession since going through it, and I found my examination of conscience had more breadth to it and was thus able to give a more complete confession.
I will give a warning. If you’re the type of person who has issues with impure thoughts and controlling them, I would recommend either not reading this book, or skipping over the sections on sins of impurity. While they’re not graphic at all, the book uses what I call “moral theology terms” when referring to things, and some of them you might find yourself having to think about what they mean by that. If you can’t control your thoughts, you could easily have them go off into forbidden areas.