This book is one of the most important Islamic books which gives right answers about Christianity.
Author: Sheikh-ul-Islam ibn Taymiyyah
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.
Publisher: http://www.al-jumuah.com - Al-Jumuah Magazine Website
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.
ًWhat is Islam?: This book explains basic introduction to the fundamental beliefs and practices of the Islamic faith. An attempt has been made to be as concise as possible, but with the hope that the reader will be encouraged to study Islam in more depth.
Author: Jamaal Zarabozo
Publisher: Ministry of Islamic Affairs, Endowments, Da‘wah and Guidance
Tawheed, the oneness of God, is the core of the Islamic faith. Mankind is assigned the duty of implementing this concept on earth in every walk of life since the days of Adam. However, Satan spares no effort to distract mankind from the guided path. This book points out and clarifies this concept
Author: Abu Ameenah Bilal Philips
Publisher: International Islamic Publishing House
A compilation of five works dealing with fasting, Taraaweeh, I'tikaaf, Zakaat-ul-Fitr, and Eid.
Author: Muhammad Salih Al-Munajjid
Publisher: Islamic Propagation Office in Rabwah
Source: http://www.islamhouse.com/p/1351