Werewolves of the Other London — Amy Cross

Separated from Duncan, Jess heads back to London on a mission to find her missing friend. She soon discovers, however, that Duncan is already dead and buried. Not that being dead will necessary hold him back... After heading into the Underworld, Jess discovers a nightmarish second city beneath London's streets. There, she begins to understand the true nature of Duncan's world. Dangerous forces are closing in â€" in both versions of London â€" and finally Jess has to choose a side in the growing war between werewolves and mankind. Werewolves of the Other London is the second book in the Lupine Howl series. Originally published in serial format in 2012, this revised edition brings together parts five, six, seven and eight of the story and ends on a cliffhanger.