The testimony of "Laa ilaaha ill-Allah", its meaning, prerequisites, conditions, and fruits.
Author: Saleh Bin Fawzaan al-Fawzaan
Publisher: http://www.islammessage.com - Islam Message House Website
Source: http://www.islamhouse.com/p/1223
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
Concept of God in Major Religions.
Author: Zakir Naik
A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
This book follow the Adadith (prophet sayings) in an attempt to trace their miraculous nature from a scientific perspective so as to pave the Sunnah's way into the hearts of Muslims and non-Muslims as well.
Author: Zaqlol El-Naggar
Publisher: Al-Falah Foundation, Translation, Publication and Distribution
The World of the Angels is an example of traditional learning and its translation fills a much needed gap in aqida (beliefs) literature in the English speaking world Basing himself exclusively on the Quran and Hadith, Sheikh Kishk deals with every aspect of the angelic world. He goes from discussing the creation and nature of the angels to enumerating their many different types and also explains their role in existence and the character of their interaction with the human race. An in depth understanding of the nature and activity of the angels is essential for the people of today. Particularly in the face of the onslaught of scientific materialism which has done so much to weaken the bases of belief in this time. This book should help a great deal towards this end.