Meet Osbert Brinkhoff, the unlikeliest of avengers. His is a tale of dark delights and ghastly goings-on, of injustice and revenge. The villains are vicious. The settings are sinister. And good does NOT always prevail.... If you prefer cleavers to kittens and fiends to fairies...then welcome to the dark, hilarious world of Schwartzgarten.

When twins Greta and Feliks lose their beloved Aunt Gisela to a poisoned marzipan cake and are sent to the ill-omened Schwartzgarten Reformatory for Maladjusted Children it seems their fate is sealed... that is until they are rescued by the glamorous and wealthy Olga Van Veenen, a fabulous children's author. The two twins are grateful but something tells them that Olga's motives are not entirely genuine...

Meet Marius Myerdorf, the newest recruit of Schwartzgarten's most secret of societies. His is a tale of adventure and abduction, friendship and fearlessness, as the Band of Blood race against time to unmask two of the foulest fiends in the history of the Great City. The deeds are dastardly. The twists are terrifying. And happy endings are not always guaranteed.