I have been reading the Dead Sea Scrolls and I am currently in the Scroll of the Rule. Some things that have caught my eye are:
 The interpretation of Isaiah by these Essenes…close, but yet so far off to the truth. The Essenes had to leave the cities for their desert caves, and the Scroll refers to this by saying:
…they shall be separated from the midst of the habitation of perverse men to go into the desert to prepare the way of ‘Him’: as it is written, In the wilderness prepare the way of …. Make straight in the desert a highway for our God. This (way) is the study of the Law which He has promulgated by the hand of Moses, [Scroll of the Rule VIII:13-15]
So just as John the Baptist went into the desert and lived apart from the mass of Israel, calling them to repentance and fulfilling the Isaiah passage, the Essenes withdrew. But they missed both the forerunner and the Messiah with their interpretation of the passage.
 The Essenes forsook the sacrificial system of the Temple much as later Rabbinic “Judaism” would do and yet claimed to be zealous for the law. I don’t know how they squared this circle. The law contains the sacrificial system for atonement but the Essenes believed the priesthood and the Temple to be corrupted and impure. The Scroll says:
…they shall expiate guilty rebellion and sinful infidelity and (procure) Loving-kindness upon earth without the flesh of burnt offering and the fat of sacrifice, but the offering of the lips in accordance with the law shall be as an agreeable odor of righteousness, and perfection of way shall be as the voluntary gift of a delectable oblation. [Scroll of the Rule IX.3]
And they shall not depart from any maxim of the Law to walk in all the stubbornness of their heart. [IX.10]
Just as modern Judaism and Islam claim to keep Torah but in no way keep the sacrificial system, so the Essenes forsook the Law while claiming to keep it. I am interested to see if the other scrolls address these subjects in more detail.