A Gathering of Shadows

Just like the first book, this one introduced a lot of really cool concepts in the magic and worldbuilding, then spent most of its time not following up on them. It also suffered a lot from middle book syndrome and setting up for the final book, and it didn't help that I don't love either of the main POV characters. However, there was still some stuff to enjoy (especially the White London plot), and I'll probably finish the trilogy.