I am a former, relatively-devout Roman Catholic who is now an Orthodox catechumen. I had no bad feelings toward the church and left almost reluctantly - part of breaking away was fairly painful, despite the joy I am moving toward in Orthodoxy. So I was somewhat sensitive to any polemical writings geared toward Catholics, including Clark Carlton's book - though because I was reading for information not much of it struck me too sharply.
I would really recommend Bp. Kallistos Ware's "The Orthodox Way," however, because he isn't really talking about many of the differences between the churches in that book but focuses on what Orthodoxy teaches about the Father, the Son, and the Holy Spirit. This was the first place I encountered the idea that perhaps Christ would have become incarnate anyway, even if we hadn't fallen, an idea that struck me like a bolt from the blue. It was easy to believe in a loving God after reading that book, and it presented me with a portrait of God I realized I had never been able to see in the RCC. That was the clincher, not any doctrinal arguments. The doctrinal differences I learned about later, and despite my love for the Roman church, because of this loving picture of God I had very little trouble accepting anything the Orthodox church teaches. I had the feeling that any church that has such a picture of God - one that resonates so deeply - could not have wrong doctrines.
I feel for your family deeply. As I said, I loved the church - it was where I grew up, and my mother was a convert to Roman Catholicism, so our being there was not incidental. It was where I first learned about God. But it was just prep for Orthodoxy. (Oh yeah - my father is still Roman Catholic, but he is coming this weekend to Divine Liturgy. Maybe it will pique his interest. My prayers are with you and your family. It is hard not to wish that our loved ones would find all that we have in Orthodoxy.)