Bit of a niche title, but useful. There are a number of rules and guidelines that can be incorporated into non-horror campaigns at the DM's discretion such as dreamscapes, omens, and expanded rules on fear. One of the primary reasons to get this title is the Dread Necromancer class, which provides endless cheese opportunities with their negative energy touch attack. Less useful than the Complete series, but worth a look. Especially around Halloween.
[4 of 5 Stars!]