The conflict between truth and falsehood is ongoing and will last as long as this world remains. The fact that some groups among the Ummah of Muhammad (peace and blessings of Allah be upon him) are following the people of falsehood.
Author: Muhammad Salih Al-Munajjid
Publisher: http://www.islamqa.com - Islam : Question & Answer Website
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
Ibn Rajab al-Hanbali This is a treatise we have written concerning humility (Khushu') and the hearts meekness and breaking (inkisar) before the Lord. The basic meaning of Khushu', is the softness of the heart, its being gentle, still, submissive, broken, and yearning. When the heart is humble, so too is the hearing, seeing, heard, and face; indeed all the limbs and their actions are humbled, even speech. The source of the Khushu, that takes place in the heart is the gnosis of Allah's greatness, magnificence, and perfection.
Author: Ibn Rajab Al-Hanbali
This is a brief book which explains the meanings and the definitions of the miracle. It also takes a look at some of the scientific facts mentioned in the Quran which modern scientists, Muslim and non-Muslim alike, affirm as true.
Author: Ahmed Deedat
A book helps in explaining the concept of polygamy in Islam. It shows that Muslims are not the first nation which encourages this system but there were many nations -such as the ancient Christians- support this behavior. Afterwards, it shows the legality and conditions of this system, and rights and duties of marriage partners under it.
Author: Abu Ameenah Bilal Philips - Jameelah Jones
Reveiwers: Muhammad AbdulRaoof
A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243