Questions atheists usually ask about Allah might vary but, they're predictable. Consider these: 1. Is there evidence God Exists? 2. How can we prove there is a God? 3. Where is God? 4. What is the origin of God? Where did He come from? and more.
Author: Yusuf Estes
A wonderful booklet mentions the predictions about the Prophet Muhammed (Peace be upon him) in Psalm, Old Testament and New Testament. It also discusses some other issues.
Publisher: http://www.rasoulallah.net - Website of Rasoulullah (peace be upon him)
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Author: Zakir Naik
What are the Conditions of Du'aa? Merits of Supplications? Manners of Making Du'aa? Mistakes in Du'aa? Why invocations not Answered? This series answer those questions and other topics.
Author: Khalid Aljuraisy
Reveiwers: Muhammad AbdulRaoof
Publisher: http://www.alukah.net - Al Alukah Website
Rites of Hajj and Umrah From the book and Sunnah and Narrations from the Pious Predecessors.
Author: Muhammad Naasiruddeen al-Albaanee
A short but influential admonition regarding death.
Publisher: Daar Al-Watan
Source: http://www.islamhouse.com/p/1323