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
The testimony of "Laa ilaaha ill-Allah", its meaning, prerequisites, conditions, and fruits.
Author: Saleh Bin Fawzaan al-Fawzaan
Publisher: http://www.islammessage.com - Islam Message House Website
Source: http://www.islamhouse.com/p/1223
Concept of God in Major Religions.
Author: Zakir Naik
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 book was prepared by a group of Saudi scholars and intellectuals. They address Western mind which looks at fair truth and objective and convincing dialogue. The book, in general, discusses the most important issues and suspicions raised by Western political and media organizations in the aftermath of September 11, 2001 events. These events have placed Islam, the Kingdom, its people, and its religious, educational and social institutions in a position that requires correction and review. The book is a moderate vision in responding to the issues and suspicions. A biased reader would notice the major difference between the reality and the raised concepts and images which were far from the reality.
The Scientific Miracles of the Quran
Author: Gary Miller
Publisher: Abul-Qasim Publishing House
Source: http://www.islamhouse.com/p/1407