I will try to find some and post here.
First of all, it is anti-Christian in several important places. The few places of agreement do not validate Buddhism NOR make it compatible with historic and Biblical Christian faith.
Here is one suggestion I thought of immediately. Go to Google and type in "Ravi Zacharias Ministries." I do not know the exact URL but that's a good first stop related to Buddhism, also find his book on it. I think the book is called "The Lotus and the Cross." You can probably find it at a local bookstore or online.
I will have some more helpful advice and links for you when I can find it. Also I will pray for you, and he.
Oh, one more thing? Which part of Buddhism is he in? Is it Mahayana, Theravada, or Tibetan? (note: Mahayana is the Buddhism of China, Japan, Korea, and most often the US; Theravada the more stringent form found in Thailand, Laos, and Vietnam. Tibetan is the form based on tantrism found in Tibet, the Kingdom of Mustang, and India.)
Also is it a syncretic group like the Johrei Fellowship?
Or is it a group like Soka Gakkai or Zen that militates that only its own way is valid?
If it's Aleph, I can direct you to some sources that are helpful and send you some of my own writings about where it contradicts Christianity.