Shaikh Abdul Aziz bin bin Baz-author
It is a small but important book covers all basic information about the correctness of beliefs in accordance with the Quran and authentic Sunnah of the Prophet (peace and blessings of Allaah be upon him) . It contains Belief in Allah, His Angels, His Books, His Messengers, the Last Day, & in the Divine Destiny, and Invalidators of Islam
http://www.almeshkat.net/books/archive/books/BNBAZ.zip