A very useful article shows the pure Islamic belief of monotheism. It briefly mentions that Allah alone is worthy of worship, He is worshipped directly and Allah is not like his creation nor his creation is like him.
Author: Abdur-Rahman Demashqeyyah
Reveiwers: Muhammad AbdulRaoof
Publisher: An Islamic centre of Qatar www.fanar.gov.qa
Introduction to history of polytheism and monotheism: Allah (glory be to him) created all people as Muslims and monotheists but devils came to them and changed and distorted their religion. Allah said in a qudsi hadith, “I created all my slaves as haneefs (monotheists), but the devils came to them, made them deviate from their religion, forbade them that which I had permitted to them, and commanded them to join partners with me for which I has given no authority.” As soon as people commit a type of polytheism, Allah sends his prophets to call them to the suitable type of monotheism.
Author: Ameen Al-Ansaari
Publisher: A website Knowing Allah : http://knowingallah.com
This is a summarized study according to the texts of the Quran and the Sunnah on ablution (ritual purification with water), Ghusl (bathing), Tayammum (dry ablution) and some rulings concerning prayer.
Author: Muhammad ibn Saleh al-Othaimeen
Reveiwers: Muhammad AbdulRaoof
Publisher: http://www.islamweb.net - Islam Web Website
The story of one of the Companions search for the truth.
Author: Dr. Saleh As-Saleh
Source: http://www.islamhouse.com/p/1225
Just One Message: is a book to those who seek the truth sincerely, honestly, and open-mindedly.
Author: Naji Ibrahim al-Arfaj
Concept of God in Major Religions.
Author: Zakir Naik