First, I want to say that my heart goes out to the family of Dr. Eby who recently passed away.
On the other hand, these kind of books should never be used to substitute scriptural truth. If I recall correctly, the Lord never admonished us to seek the "unconfirmed" experiences of man to validate his return. How could Dr. Eby possibly know when Jesus would come back as he claims and so many others have claimed (be it day, week, year, month, etc.) when Jesus said in his word that he didn't even have that answer; only the heavenly father knows (Mt 24:36 ).
I don't care how you try to clean it up, when people make claims concerning any event and that event fails to happen by the time proclaimed that person has exposed themself as a false propeht.
As human beings, we are always seeking signs and wonders to validate what God has already declared in his word (Mt 16:4). However, the scriptures are complete and final.
People, stop tryng to validate God's word and accept it by faith. Without which it is impossible to please God (Hebrews 11:6). We should live a life that is pleasing to Christ whether he comes back today, next year or a 100 years from now.