ما أبرز الكتب والمراجع التي تتناول موضوع الثالوث المقدس للمساعدة في إعداد بحث تخرج عن التوحيد في الإسلام والمسيحية؟

Islam is the religion of Tawhid (monotheism), and whoever is not a Muslim is among the people of Hellfire, as Allah Almighty says: ﴿Indeed, the religion in the sight of Allah is Islam.﴾ (Al Imran: 19), and His saying: ﴿And whoever desires a religion other than Islam, it will never be accepted from him, and in the Hereafter he will be among the losers.﴾ (Al Imran: 85). Christianity is a religion of polytheism and the trinity; they worship the Christ and his mother besides Allah, and they have disbelieved by their saying: ﴿Indeed, Allah is the Messiah, son of Mary.﴾ (Al-Ma'idah: 17), and their saying: ﴿Indeed, Allah is the third of three.﴾ (Al-Ma'idah: 73). Christians and polytheists are equal in Hellfire.

It must be established that the Christian creed is far from monotheism, and any research that seeks to beautify their creed must be excused from.