Left Hand Path deals with the rebels and outcasts of mage society, those that are isolated from the Pentacle and Seers, often with very good reason. The book is divided into four, dealing with the Heretics, Mad, Scelesti and Reapers.
It starts off by explaining how the pentacle and seers deal with the Apostates, and how to become one, before looking at the individual factions.
The Heretics and Apostates are those that have rejected the teachings of the Pentacle or Seers, but still remain “normal” mages. As such, they seem to be most likely to be used as player characters. There are some good ideas about how to use them as protagonists and antagonists in your stories, as well as several story seeds focusing on them.
The Mad remind me of the Marauders in the old world of darkness, although they do get a very new world of darkness spin on them. They are based on the gothic idea of madness that stems from moral decay, and some of the details about them manage to be disturbing. Ideas are given how to use them in a chronicle, as well as some suggested Mad. I think that they have a lot of potential, but I found the section on them a bit sparse and lacking.
The Scelesti are a bit of a stereotypical villain group, in the fact that they want to end the world as we know it, possibly to replace it with the Abyss. The information in here expands on the Mage rulebook, and presents other factions of the Scelesti, as well as some ideas about their structure, organisation, and practices.
Finally, the Repers are discussed, with a long section on the Tremere, although I find the two new factions intorduced in that section far more interesting, especially the (Legion), which have the right mix of interesting and creepy to be used in most games.
[4 of 5 Stars!]