Kraken is set in modern London and concerns a curators descent into the city’s occult underbelly after the theft of a specimen of giant squid. It’s a Tim Power-ish set up and story (in a way, so was Mieville’s last modern novel, The City and the City), I think, but written in Mieville’s distinct prose style.
Anyway, there are several good ideas in here that I wish I had thought of first. There is a general strike amongst magical familiars, being lead by the spirit of an ancient Egyptian shabti, who took part in an uprising against the dead they were meant to toil for in the after-life. There's the menacing duo (there are a lot of menacing duos in fiction, aren’t there?) Goss and Subby, who get into a magically protected house by having themselves folded up and mailed in a box.
Best so far, though, is Mieville’s description of the “memory angels” which guard various London museums:
“In the Museum of Childhood were three toys that came remorselessly for intruders--a hoop, a top, a broken video-game console--with stuttering creeping as if in stop-motion. With the wingbeat noise of cloth, the Victoria and Albert was patrolled by something like a chic predatory face of crumpled linen. In Tooting Bec, the London Sewing Machine Museum was kept safe by a dreadful angel made of tangles and bobbins and jouncing needles...”If there's anything the City needs its genius loci like that!