Issues that the caller to Allah must obtain
Author: Muhammad ibn Saleh al-Othaimeen
Compassionate Among Themselves Mutual Compassion between Members of the Prophet’s Household and the Rest of the Companions: A brief book on the Prophet's Household and the Companions in the light of Glorious Quran and Sunnah.
The Criterion Between The Allies Of The Merciful And The Allies Of The Devil, by Shaikh Al-Islam Ibn Taymiyyah.
Author: Sheikh-ul-Islam ibn Taymiyyah
Translators: Salim Morgan
This is a useful book although it is small. It contains some technical terms for da'wah in English. No doubt all scholars and callers to Islam in English are in much need to something like that to conveys the right message of Islam to all those speak English.
The Three Fundamental Principles and the Four Basic Rules of Islam.
Author: Muhammad Bin Abdul Wahhab
Publisher: Daar Al-Watan
Source: http://www.islamhouse.com/p/1333
Brief lessons in fiqh, da'wah (calling to Islam), Creed and hadeeth and its terminologies taught in the Educational Department of Islamhouse. They help Muslims to be aware of what he indeed needs regarding the Islamic sciences. They also give him a glimpse of qualities of the caller to Islam.
Publisher: Islamic Propagation Office in Rabwah