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.
The Virtues of Allah’s sacred month of Muharram and Fasting on Aashooraa.
Author: Muhammad Salih Al-Munajjid
Publisher: http://www.islamqa.com - Islam : Question & Answer Website
Source: http://www.islamhouse.com/p/1343
The book was compiled by Imam An-Nawawi who was the great scholar of Hadith and Fiqhof his time. Commentaries on the Ahadith have been added by Hafiz Salahuddin Yusuf of Pakistan who had originally executed them for the Urdu edition of this book. The English translation of the book and the - commentaries was performed by Dr. Muhammad Amin and Abu Usamah Al-Arabi bin Razduq who have performed their task with utmost care and profound interest.
Author: Abu Zakaria Al-Nawawi
This colorful book is for non-Muslims who would like to understand Islam, Muslims, and other facets of Islam.
Author: I. A. Ibrahim
Publisher: http://www.islam-guide.com - Islam Guide Website
Source: http://www.islamhouse.com/p/1221
Fatawaa concerning Taraweeh
Author: Abdul Aziz bin Abdullah bin Baz
Source: http://www.islamhouse.com/p/1265
Why I Chose Islam: A story of a priest who reverted to Islam, it is based on a True Story.
Author: M. Emery
Publisher: Islamic Propagation Office in Rabwah