@AviraDeArah I’m sorry to burst your bubble but the mechaber of the Sefer is actually someone who did not grow up Lubavitch. You therefore can’t claim that he was brainwashed or has an agenda. He came to Lubavitch on his own because he felt that that is where the emes is. He studied the topic of moshiach for over 25 years so I think he knows it a little better than you. His goal is truly to spread achdus amongst yidden. He said his goal with his Sefer is to show that there is base to claim moshiach mhameisim.