Riddler's Fayre Book 2 - The Game of Revenge. Steve Carroll

In his quest to discover his own identity, Aeden, travels with the Fayre to London. In the deep winter of 1199 AD he finds others who are seeking the First Matter – the secret substance which will create the Philosopher’s Stone. But Aeden also hears unwelcome news of his association with treachery. In this, the second of the Riddler’s Fayre series, we are taken to a dark London we wish history would forget.