A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
This treatise was prepared by the Agency of Islamic Enlightenment in Hajj. Includes a discussion about those things which nullify a person's Islam as well as common errors made by the commonfolk.
Author: Muhammad ibn Saleh al-Othaimeen
Source: http://www.islamhouse.com/p/1377
This colorful book is for non-Muslims who would like to understand Islam, Muslims, and other facets of Islam.
Author: I. A. Ibrahim
Publisher: http://www.islam-guide.com - Islam Guide Website
Source: http://www.islamhouse.com/p/1221
People face many obstacles which they think stand between them and repentance, some of which exist within their own selves, and others in the world around them. This brief book clears up this confusion, dispel doubts, explain wisdom and drive away the Shaytaan.
Author: Muhammad Salih Al-Munajjid
This book talks about the life story of Muhammad, may Allah exalt his mention, and his beautiful manners. It also brings to light statements for contemporary figures in Western society, who spoke favorably of Prophet Muhammad, may Allah exalt his mention.
Author: AbdulRahman Bin Abdulkarim Al-Sheha
Translators: Abdur-Rahman Murad
Publisher: Islamic Propagation Office in Rabwah
Source: http://www.islamhouse.com/p/1385
A simplified Introduction to Islam in English language in categories of question and answer in different aspect, and it increases the question from non Muslims.
Author: Muhammad Bin Abdul Wahhab
Reveiwers: Muhammad AbdulRaoof
Translators: Mahmoud Reda Morad Abu Romaisah
Publisher: Cooperative Office for Propagation, Guidance, and Warning of Expatriates in the city of Albatha - A website Islamic Library www.islamicbook.ws