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 small but beneficial treatise concerning innovation, celebrating the birth of the Prophet (s), as well as a small note about Wahhabiyyah and the creed Muhammad bin Abdul-Wahhab.
Author: Abdul Aziz bin Abdullah bin Baz
Source: http://www.islamhouse.com/p/1267
This book is an authoritative source on a matter of central importance to everyone: the events of Akhir al-zaman the final period of this world’s history The work is by Ibn Kathir. an eminent Muslim scholar and is based entirely Upon authentic texts. The many Ahadith or Traditions. The Blessed Prophet Muhammad (Peace be Upon Him) described the condition in which people would live in those times.
Author: Imam Ibn Kathir
Reveiwers: Muhammad AbdulRaoof
Why I Chose Islam: A story of a priest who reverted to Islam, it is based on a True Story.
Author: M. Emery
Publisher: Islamic Propagation Office in Rabwah
A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
A Book detailing the rulings concerning Hajj and Umrah.
Author: Mahmoud Reda Morad Abu Romaisah
Publisher: Islamic Propagation Office in Rabwah
Source: http://www.islamhouse.com/p/1391