Ben Aaronovitch & Andrew Cartmel 
Rivers of London: Night Witch #1 [EPUB ebook] 
Night Witch #1

An all-new Rivers of London original comic series, written by Ben Aaronovitch and Andrew Cartmel!

A police vehicle on a routine prison transfer in north London is stormed by Russian hoodlums seeking to free a very particular prisoner. Their target is a witch. A very powerful witch who doesn”t want to be free. Things rapidly turn very ugly for the hoods and it”s soon a job for full-time police constable and part-time wizard, Peter Grant.