These are three good books for learning Arabic Language for the non-native speakers. But we should pay your attention that they are for who has slightly good knowledge about Arabic and how to pronounce it. We don't claim that you can consider them as an alternative to a teacher but they are good step for who wants to be excellent at Arabic. With these books, there is an Arabic-English glossary confined to the words mentioned in these books, and the author shows in its introduction how to find any word.
Truly & Falsely Jesus In the Bible
Author: Saleh Ali Alsobiyl
Saheeh International, based out of Saudi Arabia, Translated the meaning of the Quran in English, which is most appropriate for non-Muslims, it is easy and clarity of words and meanings.
Publisher: http://www.islambasics.com - Islam Basics Website - Sahih International
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.
A detailed description of the different ways the Prophet (s) advised people.
Author: Muhammad Salih Al-Munajjid
Publisher: Islamic Propagation Office in Rabwah
Source: http://www.islamhouse.com/p/1359
A clarification of the great danger magic poses to Muslims and various du'aas to cure it
Author: Abdul Aziz bin Abdullah bin Baz
Publisher: Daar Al-Watan
Source: http://www.islamhouse.com/p/1263