I've always been a fan of unorthodox player character races. And you don't get much more unorthodox than this. Rules to play a Derro.
Well, not a Derro per se, the book gives rules for playing a "Lesser" Derro, a weaker, albeit less insane, version of the Derro which is more appropriate for PC classes.
It has a lot of neat stuff: New feats and spells (one of which lets you literally melt faces), as well as advice for playing a Derro PC and avoiding playing them as a "Fishmalk". There is also a minor insanity table for specific forms of madness your Derro can have.
If I have any complaints its that the Derro presented here are different from the Derro described in "Classic Horrors revisited", which rather closely follows the roots of the Derro by making them resemble the Shaver mystery.
Another complaint is that it lacks something I would really like: A divine caster archetype that would allow derro to cast divine spells in spite of the fact the default Derro typically has like 4 wisdom.
But these are minor things. In all, I am very pleased with this product, and recommend it (and the rest of the advanced races books, of which I have the Aasimar and the Gnoll books which I got from the Southlands kickstarter) for anyone who wants a new PC race to spice things up.
