From publisher blurb:
A Touch of Class
Class grafts are a marvelous innovation in the Starfinder Roleplaying Game, allowing you all the fun at the table of incorporating all kinds of character classes into your allies and enemies but with a minimum of bookkeeping and weird rules interactions. That’s great if you’re using the core Starfinder classes, but what about all those amazing third-party classes out there?
Star Classes: Class Grafts is the answer, bringing you class grafts for twenty third-party classes from Legendary Games and Little Red Goblin Games for every kind of situation, whether you need a combatant, expert, or spellcaster! You’ll find astral marines and bikers, psions and replicators, cantors and bizlocks, nanomancers and mystic space knights, and so many more brought to you by the powerful pen of Sasha Laranoa Harving, a frequent contributor to official Starfinder Roleplaying Game adventures and accessories.