The authentic manner of offering peace and blessing upon the Prophet (peace be upon him) was reported in the Hadith Sahih (authentic Hadith):
O Allah, confer peace and blessings upon Muhammad and the members of his household as you did confer upon Ibrahim and the members of Ibrahim's household. Grant favors to Muhammad and the members of his household as you did grant favors to Ibrahim and the members of the household of Ibrahim. You are indeed Praiseworthy and Glorious."
If one only says, 'O Allah! Bless our Prophet Muhammad, it is sufficient. And Allah's Statement (Exalted be He):
O you who believe! Send your Salât on (ask Allâh to bless) him (Muhammad صلى الله عليه وسلم), and (you should) greet (salute) him with the Islâmic way of greeting (salutation i.e. As-Salâmu ‘Alaikum).
(Part No. 2; Page No. 247) As for the book in question, we do not recommend you to rely upon it, since it is unknown and the way of conferring peace mentioned in it is not prescribed, nor reported from the Salaf (righteous predecessors). Moreover, what is prescribed by Allah is sufficient.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.