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)
This is a useful book although it is small. It contains some technical terms for da'wah in English. No doubt all scholars and callers to Islam in English are in much need to something like that to conveys the right message of Islam to all those speak English.
Islamic view of Contemporary Issues - The book still under editing
Author: Abu Ameenah Bilal Philips
Source: http://www.islamhouse.com/p/1247
This book is one of the most important Islamic books which gives right answers about Christianity.
Author: Sheikh-ul-Islam ibn Taymiyyah
According to Biblical scholars and the text of the Bible itself, Shaikh Ahmed Deedat explained in detail regarding "Is the Bible God's word?"
Author: Ahmed Deedat
This is a very useful book contains important information despite its few pages. It shows how to perform the second pillar of Islam i.e. prayer. At first, the author some words from book "The Dispraise of Desire" authored by Ibn Al-Qayyem. Then he talks about some issues pertaining to prayer e.g. meaning of prayer, its merits, its times and conditions should be met before performing it. It is characterized by containing audio sections showing what is said during the prayer.
Author: Dr. Saleh As-Saleh
Reveiwers: Abu Adham Osama Omara
Publisher: http://www.turntoislam.com - Turn to Islam Website