I havent picked up any of Rabbi Ben Samuels books. But if this prophecy was real, I think I would have heard of it from Jewish sources. It is, after all, an exclusively Jewish prophecy about the reconquest of Jerusalem. Heck, it probably would have been drilled into the head of every young Mafdalnik (Religious Zionist). It isnt.
My bet is that this prophecy is a crock, pitched to the gullible to separate them from their money.
He endeavored to deepen the feeling of devotion and pietyWhen I read his wiki page,
Baruch HaShem
something stood out: The study of the Talmud, especially as it was treated
Most Rabbis view the Talmud with great admiration.
by his contemporaries, seemed to him fruitless.
and emphasized the importance of studying the Bible as
against studying the Talmud.
This may have something to do with his Blessed Memory.
Col 2:16,17 tells us that the new moon and the Feasts of the Lord are a shadow of things to come. Trumpets is the only one that falls on a new moon, so maybe we should watch carefully.