Suveh Nux lets you work out what it's all about just by experimentation. Once I got my book, I started off by typing all the spell names. Then I charted down their effects, and what happened if I used them more than once. This just led to more ideas with what I could do, and it feels rewarding to keep trying and learning new spells. There's a small aspect that confused me, and it was (Spoiler - click to show)the ANI effect. I noticed that some of my effects were delayed, but I thought it was a method to make my next spells immediately more powerful; like maybe it would be better than casting it multiple times in a row? Still, the game has a useful hint system, and is loaded with Easter eggs. Try everything you can, and even if you don't, it's still a fun game.