A lecture delivered in Arabic and translated into Oromo in which Sh. Ibn Baz shows the principles and invalidators of the Islamic creed as in the Quran and Prophetic Sunnah, for a Muslim's acts of worship are only accepted if he has an authentic creed.
A useful book in Oromo mentions some important points about zakah and others about fasting such as Ramadan virtues, along with some related points that lots of people may not know.