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.
Its author said in the introduction, "It is a known fact that every language has one or more terms that are used in reference to God and sometimes to lesser deities. This is not the case with Allah. Allah is the personal name of the One true God. Nothing else can be called Allah. The term has no plural or gender. This shows its uniqueness when compared with the word "god," which can be made plural, as in "gods," or made feminine, as in "goddess." It is interesting to notice that Allah is the personal name of God in Aramaic, the language of Jesus and a sister language of Arabic."
An informative guide to marriage and its various rulings.
Author: Muhammad Naasiruddeen al-Albaanee
Source: http://www.islamhouse.com/p/1275
A book which explains the Prohibitions That Are Taken Too Lightly, Allah has laid down obligations which we are not permitted to ignore, and has set limits which we are not permitted to transgress, and has set out prohibitions which we are not allowed to violate.
Author: Muhammad Salih Al-Munajjid
Publisher: http://www.islamqa.com - Islam : Question & Answer Website
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
A nice book covering many aspects of wudoo, ghusl, tayammum, and wiping over socks and bandages.
Author: AbdulRahman Bin Abdulkarim Al-Sheha
Source: http://www.islamhouse.com/p/1381