I read the first four of these books one after the other and it was a bit much so I decided to take a break. I was getting annoyed that Atticus was blithely going about his business (euphemism for causing absolute chaos in Asgard) and not receiving any payback for the pretty momentous things he was doing.
But in book five, the payback starts to happen. There are vampires, dark elves, dwarfs, Norse gods, Roman gods, Greek gods (yes, they are very different, and don't let anyone tell you otherwise), And they all have scores to settle.
But the best bit is, it turns out Granuaile is a cat person. Take that, Oberon!