Thanks so much for saying so! I'm glad you enjoy them.
Spells and spellbooks are something I've been planning to make for a while now. I just haven't gotten around to it.
For right now, there aren't any defined spells. A spellcaster can simply cast whatever spell you think is appropriate for their class. Decide which stat is their spellcasting stat, roll the dice, and use the results to figure out how effective the spell was.
If you want your character to be especially good at a specific spell, list the name of that spell as one of the things they know because of their class training.