The Choice - Islam and Christianity: Two Volumes, By Ahmed Deedat, An excellent book discussing Islam and Christianity in the light of Holy Quran and the Sunnah.
Author: Ahmed Deedat
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)
God in Christianity... What is His Nature?: The intent of this work is to honestly and sincerely present the truth that was found
Author: Naji Ibrahim al-Arfaj
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 is a book presented by Rasoulallah Website (http://www.rasoulallah.net) shows aspects of our Prophet’s life. It contains topics as: his manners, his exemplary justice, his simple life, his love for the poor, his forgiveness shown to the non-Muslims. It includes other important topics as: how did he achieve reform, can he be taken as a model for Muslims to follow and how did he instill brotherhood among Muslims?
Publisher: http://www.rasoulallah.net - Website of Rasoulullah (peace be upon him)
This is an advice from the previous Grand Mufti in Saudi Arabia in regard to Riba (usury) transactions that have proliferated in the recent times through the numerous financial institutions that have been established throughout the world.
Author: Abdul Aziz bin Abdullah bin Baz
Translators: Jalal Abualrub