A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
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.
The Importance of the issue of ijtihad, who has the right to make it, and caution of speaking about the religion without knowledge
Author: Salman Bin Fahad al-Awdah
Publisher: http://www.islamtoday.net - Islam Today Website
Source: http://www.islamhouse.com/p/1403
3 Treatises concerning Tobacco by the great scholars: Muhammmad bin Ibraaheem, as-Sadi, and bin Baaz
Author: Abdul Aziz bin Abdullah bin Baz - Abdur-Rahman Bin Nasir as-Sadi - Muhammad bin Ibraaheem Aal-ish-Sheikh
Source: http://www.islamhouse.com/p/1235
A proof that the Qur'an is from God and that Muhammad is a Messenger of God.
Author: Abdullah Bin Abdur-Rahman AL-Jibreen
Publisher: Memphis Dawah
Source: http://www.islamhouse.com/p/1285
This book gives a clear explanation of the Muslim sound Creed which is the core of the religion of Islam, as the belief in Tawhid (monotheism) is the purpose for which Allah created both mankind and jinn, and thus, those whoes belief in Tawhid is corrupt, are not considered Muslims.
Author: Saleh Bin Fawzaan al-Fawzaan