From publisher blurb:
Races of Center Space 5 is a new series that converts the races found in Center Space to 5th Edition rules. The Center Space is a science fiction setting, but this race can easily be used with other genres.
The first volume presents the Sissith--a race of cunning, stealthy assassins which evolved from predatory arachnid-like creatures.
This book contains racial description and feats for the Sissith, as well as suggestions for adapting it other settings.