I don't know this book, but have you tried to search on Youtube? That could be a good starting point. There are so many posts on Orthodoxy. I've always found it interesting how people come to Orthodoxy. For some it's the history, some the service, some theology, some the Holy Scriptures, some through observing nature and others through hearing the chants. But, we can never know what will be that one thing that will make the difference. So try all the angles and see what happens. What convinced you will not convince him.