From the book:

This is a commentary on the treatise by the reviver, Imam Shaykh Muḥammad bin ʿAbd al-Wahhāb (May Allah have mercy upon him).It addresses the conditions of the prayer, which he (May Allah have mercy upon him) derived from the books of Fiqh, following the Ḥanbalī school of thought. We ask Allāh to bestow upon him vast mercy and to reward him generously on behalf of Islām and the Muslims. We also ask Allāh to gather us, you, and him among His righteous servants, along with the Prophets, the truthful, the martyrs, and the righteous—what an excellent company they are. May Allāh elevate the rank of and grant peace to our Prophet Muḥammad, as well as his family and all his companions.