New Practical Chinese Workbook, Vol. 1 /// This is a great Christian product sourced from BIML - Bible In My Language, the leader in foreign language Bibles and outreach materials from Baltimore, Maryland in the USA. BIML stocks Bibles in more than 600 languages.
I used this book to learn Chinese while in China. It was the first actual workbook I completed and I enjoyed the experience so much I told myself I would be conversational in mandarin. I'm not where I want to be yet but I do recommend this book.