
What kicks everything off for Billy Harrow is the theft of a preserved giant squid from his museum -- a theft that should have been impossible to accomplish and for which no one claims credit. Harrow suddenly becomes the target of interest for a squad of London police officers who specialize in the occult, a squid-worshiping cult, and other less savory groups. Through it all, he must both adapt to this new London and figure out who stole the squid and why before the city of London is wiped out forever.
Kraken is similar to Neverwhere, if Neil Gaiman hadn't faded to black for the violent bits. Miéville is graphic and dark, and often the scenes of violence were difficult for me to read. Moreover, his hyper-realistic dialogue and slightly off-kilter descriptions sometimes left me wondering just who was talking in any given conversation or whose point of view we were supposed to be using at any given moment.
( Spoilers behind here )
All told, it was an enjoyable -- if a bit disorienting -- read. That said, I'd probably prefer Perdido Street Station if I were to ever reread a Miéville book, and I'm glad I just got this one from the library instead of spending money on it.