The most powerful sources of information come from within; the Tarot aids in coming into contact with one's Higher Self.  In doing so, one can gain knowledge of both the inner self and the world.  These materials provide the student with information on the Tarot and its proper use.
The Tarot, Its Occult Significance, Use in Fortune-Telling, and Method of Play, Etc., by S.L. MacGregor Mathers
The Cross And Triangle Spread

Esoteric Order of the Golden Dawn