Not intending to spoil, because this is just me reading through my peculiar mental filter, but Three Parts Dead not only rang odd Invisible Library bells, it rang odd Phoenix Wright bells, and thus took me happily back to incandescens' visit last October.
Excellent book. Would will read again when it's out in paper, if only to track down some of those resonant throwaway details, that are more resonant than Aaronovitch's by virtue of being weirder. The territory ruled by King Clock? The kingdom of Koschei? I'm in.