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.
A small but beneficial treatise concerning innovation, celebrating the birth of the Prophet (s), as well as a small note about Wahhabiyyah and the creed Muhammad bin Abdul-Wahhab.
Author: Abdul Aziz bin Abdullah bin Baz
Source: http://www.islamhouse.com/p/1267
Fortress of the Muslim, Invocations from the Quran and Sunnah: is a very beautiful booklet consists of many authentic Dua's (supplications) for a Muslim to supplicate on a daily basis and on special occasions.
Author: Saeed Bin Ali Bin Wahf Al-Qahtani
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
Lessons on Fasting, Taraweeh & zakaat: contains numerous beneficial points. Itis divided up into eight sections, which were designed to serve as lessons on distinct topics commonly talked about during the month of Ramadan.
Author: Muhammad ibn Saleh al-Othaimeen
Translators: Abu Maryam Ismaeel Alarcon
Faith in the sense of belief is based on six principles, which are mentioned in the hadith of Jibreel (peace be upon him), when he questioned the Prophet (peace and blessings of Allah be upon him), who said: “Faith means to believe in Allah, His angels, His Books, His Messengers, the Last Day, and the Divine Decree, both good and bad.” (Agreed upon). This series explain those articles of faith in detail.
Author: Mahmoud Reda Morad Abu Romaisah
Publisher: Cooperative Office for Propagation, Guidance, and Warning of Expatriates in the city of Salay, Riyadh - A website Islamic Library www.islamicbook.ws