Kitab At-Tawheed is one of the best books on the subject of Tawheed (Islamic Monotheism) and ranks high in authenticity. Till date it has gone through various publications; and had been the means for guidance of the millions of people throughout the world; by taking them out of the darkness of polytheism and error.
Author: Muhammad Bin Abdul Wahhab
Publisher: http://www.islambasics.com - Islam Basics Website
Ibn Katheer, At-Tabari, As-Syooti and Other Historians. The four Rightly guided Caliphs (Khaliph's) Abu Bakr As-Sideeq, Umar ibn Al-Khattaab, Uthmaan Ibn 'Affaan and Ali Ibn Abi Taalib. The Biography of Umar Ibn Abdel-Azeez who is regarded as one of the Rightly Guided Chaliphs is also included in this book.
Author: Imam Ibn Kathir
Plots of the kuffaar and the Muslim response.
Author: Abdul Aziz bin Abdullah bin Baz
Publisher: http://www.islammessage.com - Islam Message House Website
Source: http://www.islamhouse.com/p/1259
A monumental work discussing the Makkan period of the Prophet's life, and a refutation of Orientalist attacks.
Author: Muhammad Mohar Ali - Mohammed Mahr Ali
This nice article discusses a very nice topic. It discusses the meaning of Allah's name: An-Nur (the Light). No doubt lots of Muslims did not read about its meaning due to its being obvious but we should take much care of knowing any aspect of Islam even if we think it is very clear. Dr. Saleh As-Saleh explains its meaning through explaining the verse in which it is mentioned in Surat An-Nur.
Author: Dr. Saleh As-Saleh
Publisher: http://understand-islam.net - Understand Islam Website
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