Many people wrote books. You can buy unlimited books about Christ and some of the officers are Christians themselves with a lot of experience or others are Bible scholars. Or even people that had huge Ministries and that became world famous. Or you can simply pray and read the Bible and discover for yourself. But this particular author looks at the character of Christ and examines the fabric. Incredible isn't it. It's good for people that are without understanding to listen to others who have some knowledge and even spiritual understanding if you can come across that