From publisher blurb:
Build, Raise & Rear
You've discovered the adorable and now it's time to bring those adorable creatures on your 5e adventures. This supplement will help you create critters to join you on your adventures and are also designed to level up with you as you go!
This book does not contain raw stats for every baby beastie imaginable, that would be far too much work. Instead what we did is created a system that allows you to easily build and improve a beast companion.
In addition, for those who want more beasts in their class design, we've also thrown in 3-beast driven sub-classes;
- Druid - Circle of Summons
- Fighter - Houndmaster
- Wizard - Familiar Spellmaster