What are the references that address the issues of excommunication (takfir), rebellion against rulers, and seeking intercession and aid from the Prophet (peace be upon him), and which can be utilized in da‘wah (Islamic proselytizing)?

Here are recommendations for books on two matters:

First Matter: Books on nullifiers of faith, parameters of excommunication (takfir), ruling by other than what Allah has revealed, and the phenomenon of extremism and excommunication.

Second Matter: Books on intermediation (wasilah) and seeking nearness (tawassul), refuting misconceptions about seeking help from other than Allah, commentaries on Kitab al-Tawhid (Book of Monotheism), and books on creed (aqidah).

In addition to fatwas from major scholars such as Ibn Taymiyyah, Ibn Abd al-Wahhab, Ibn Baz, Al-Uthaymeen, and the Permanent Committee.