There is a lot of misunderstandings when it comes to the Rosicrucians. They teach a kind of esoteric Christianity which involve rituals not too dissimilar from those of Freemasonry as in there are different grades and so on as in a fraternity but the teachings are best studied and practised by oneself. The best source to read is Max Heindel.
Do a search for "occult free ebooks" and look for Max Heindel......
Here is a good resource
http://www.occult-underground.com/heindel.html
Dan