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
Rulings regarding Eid and some common errors relating to it.
Author: Abdul-Majeed Ali Hasan - Abdul Majeed Ali Hasan
Publisher: AHYA Multi-Media
Source: http://www.islamhouse.com/p/1307
Hajj and Tawheed: Hajj is to set out for Makkah to worship Allah by performing certain religious rights in accordance with the Prophet's (peace and blessings be upon him) Sunnah. It is a time in which to call upon Allah to purify the self from any worship to anyone other than him. This booklet explains the basic rights of Hajj. It also notes that the tawheed of Allah requires the Muslim to follow the perfect way of worship, demonstrated by Muhammad (peace and blessings be upon him) and as understood by the Sahaabah who were the best of mankind.
Author: Dr. Saleh As-Saleh
A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
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
The Promised Prophet of the Bible
Author: Munqith ibn Mahmood As-Saqqar