I’m sorry, but I don’t know the answer to your first question. As for your second, an expert in finding counterfeit bills does not study every fake out there; s/he only needs to know the genuine article. Do that, and the flaws in the fakes will be glaringly apparent.

Once again, I'm sad I can't buy many appealing books online because they cost too much Indian money.

Does Amazon have an India branch?

Yes, it's amazon.in and books cost (what I deem to be) a lot.

How Doctors Think (to use an example of a book I have at arm's length, so I can check the price) , costs 395 rupees, it says on the book. 1115 on Amazon.

Dr Kreeft's book you linked above is 1,037, and that's unthinkable. Here, religious books are cheaper because the author and publisher are altruistic or may have donors.

I'm going to disagree. I worked with a kid who was "tone deaf" and with work and practice managed to get him to recognize and sing within a certain octave. I was giving him guitar lessons and noticed that he was tone deaf when he sang. Didn't think much of it. But, then one day he was on pitch for about 3 or 4 notes. Turns out, he COULD hear those pitches and sing them consistently. But, as soon as he was out of that range he was all over the place. We just started to work on expanding that range and got it up to about an octave. I then tried this with other students of mine. I found that most tone deaf people actually just have a very limited range of where their brains can hear the pitches properly to reproduce them. And this range can be expanded. But, it does take practice.

FJ

Rex Harrison. His songs in My Fair Lady are written around the few pitches he could actually sing.

All of the priests I know sing, some don't have great voices, but they can intone and follow music.

I can teach anyone to sing. I cannot give them a beautiful voice, but, I can turn out someone who can carry a tune and breathe properly. There are skills which can be taught.

Yesterday, as the organ prelude began, a little girl, perhaps 4 years old, left her pew and began spinning around in the aisle to the music. That's about the only sort of liturgical dance I would tolerate ... it was innocent and spontaneous and without agenda.

Let me bring a little disappointment into your life.

One of my major disappointments in converting was the practice of music in Catholic parishes. Bluntly, it is awful compared to that in every parish experienced in my former affiliation and much worse that that in any Protestant church I have visited. Our music director is a decent organ player, but cannot handle singing...nor does our choir. OTOH, the guy who sings the Psalm at our masses is really good.

HST, when at St Peters in Rome, I was extremely unhappy and put off by the mass of visitors and their behavior and disrespect. I was getting ready to depart, after marveling at the Holy Spirit window whilst being jarred and pushed by other tourists, when, somewhere unseen, a choir began to sing. It was beautiful and it was music like I've never heard before in a Catholic church ... and it turned my visit around. I'm a big fan of the Holy Spirit.

As to priests, they do what they can and that's good enough for me. I couldn't sing as well as the worst of them.