The lofty rank and high station eemaan possesses is not something obscure, as it is unquestionably, the most important duty as well as being the most imperative of all obligations. It is also the greatest and most glorious of them. All the good in the world and the Hereafter is dependent upon the presence of eemaan and on its soundness and integrity. Eemaan holds such a multitude of benefits, ripe fruits, delicious pro-duce, constant food and continual goodness.
Author: AbdurRazzaaq AbdulMuhsin Al-Abbaad
Translators: Abu Safwan Farid Ibn AbdulWahid Haibatan - Abu Safwah Fareed Abdul Wahid
The Choice - Islam and Christianity: Two Volumes, By Ahmed Deedat, An excellent book discussing Islam and Christianity in the light of Holy Quran and the Sunnah.
Author: Ahmed Deedat
Its author said in the introduction, "It is a known fact that every language has one or more terms that are used in reference to God and sometimes to lesser deities. This is not the case with Allah. Allah is the personal name of the One true God. Nothing else can be called Allah. The term has no plural or gender. This shows its uniqueness when compared with the word "god," which can be made plural, as in "gods," or made feminine, as in "goddess." It is interesting to notice that Allah is the personal name of God in Aramaic, the language of Jesus and a sister language of Arabic."
A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
Sahih Muslim includes sayings, doings and approvals of the Prophet Muhammad (peace be upon him) narrated by his companions. It is considered the third most authentic book in Islam after the Quran and "Sahih al-Bukhari". It covers almost all aspects of life.
Author: Muslim ibn al-Hajjaj ibn Muslim al-Qushairi an-Naisabori
Translators: AbdulHamid Siddiqui
Publisher: http://www.islamspirit.com - Islam Spirit Website
This book clearly and concisely presents the Islamic concept of Tawbah (repentance) and its viewpoint wherein salvation by faith and salvation by deeds are combined in a truly unique manner. A book that is relevant to every Muslim.
Author: Abu Ameenah Bilal Philips