The Rightly-Guided Caliphs
- Explains the Muslim concept of Caliph, and profiles the first four who succeeded the Prophet Muhammad; known as The Rightly-Guided Caliphs.
- http://www.usc.edu/dept/MSA/politics/firstfourcaliphs.html

Restatement of History of Islam and Muslims
- An online book by Sayed Ali Asgher Razwy presents the Shia interpretation of early Islam, from 570 to 661 CE, as a movement launched by the Prophet Muhammad, consummated with the support of his vicegerent 'Ali ibn Abi Talib.
- http://al-islam.org/restatement/

Medieval Sourcebook: Pact of Umar, 7th Century
- Supposed to have been the peace accord offered by the Caliph Umar to the Christians of Syria; it formed the pattern of later management of the status of non-Muslims.
- http://www.fordham.edu/halsall/source/pact-umar.html

Medieval Sourcebook: Accounts of The Arab Conquest of Egypt, 642
- A Coptic account from "The History of The Patriarchs of Alexandria", and an Arab account from Al-Baladhuri's "The Conquest of Alexandria".
- http://www.fordham.edu/halsall/source/642Egypt-conq2.html

The Four Righteous Caliphs
- A history of the first four caliphs to rule after the death of Muhammad, until the rise to power of the Umayyad dynasty. Includes a map.
- http://www.princeton.edu/~batke/itl/denise/right.htm

Brief History of Compilation of the Qur'an
- A short account of how the Qur'an was preserved and compiled, and the addition of diacritical marks.
- http://www.usc.edu/dept/MSA/quran/compilationbrief.html

Anwary Islam
- A collection of biographies of the Prophet Mohammed, his companions and wives, with an account of the Prophet's battlefields.
- http://anwary-islam.com/