If you want to learn about the Mormon Cult, it has a lot of significance. It is best, if you want to learn quickly, to learn the teachings of Mormonism as well because simply reading it may or may not lead to the same conclusions the Mormons have.
This might be quicker and easier:
FAIR
It's a mormon apologetics website, where they are attempting to defend mormonism.
Mormons believe in more gods than the Greeks and the Egyptians.
The facts that the LDS do not believe the Father, Son and Holy Ghost are one in
substance, and believe in
deification/theosis (
that humans may eventually become deified and become partakers in the divine nature), has been used to paint Mormons as polytheists. When we examine the technical terminology above, though, it becomes clear that a key point of demarcation is worship versus acknowledgment of existence. If members of the Church worshiped an extensive pantheon like the Greeks or Romans, then the label would be appropriate. In the context of doctrinal differences over the relationship among the Father, Son, and Holy Ghost, however, or the doctrine of deification (which is a profoundly Christian doctrine and not just a Mormon one), use of the word "polytheistic" as a pejorative is both inaccurate and inappropriate.