«Diary of a Wimpy Geek» by Jeff Child

Four elements, four enemies.
Martin is a nerd, and he is curious by nature. Perhaps this is why he has studied so much. But his curiosity takes a toll on him when he combines the four elements and adds a little substance to it called "zin". Each element turns into a different enemy which Martin has to outsmart or outrun. It’s only a matter of time before he realizes that he should have let it go.