Just as a side note: John Hagee's book does use the term Blood Moons however the phrase actually comes from Acts, Revelations 2:20. The term Blood Moon is also written about in the Torah, Yoel 2:31 to be specific.
Also keep in mind that the Blood Moons fall on Jewish Holidays, e.g. Passover and Sakkot. Also the Blood Moons have a specific meaning only to Israel or peoples who oppose Israel.
Some past interesting dates where a Blood Moon and a Jewish holiday lined up was:
> 1493-94 when the Jews were cast out of Spain
> 1949-50 when Israel became a state, and
> 1967-68 the Six Day War.
So what does it all mean? Maybe nothing or an attack of importance on Israel within this 18 month period that could have global ramifications especially for those countries that align themselves with the powers against Israel.
Just talking writing out loud here.