More gripping thanThe Hunger Games,The Vaultby Emily McKay is the third in this series following on fromThe Farm andThe Lair.

In a world where vampires rule and teenager humans are quarantined as a food source, there is only one choice: resist or die.

But fighting the Ticks comes at a terrible cost to twin sisters Mel and Lily and their best friend Carter - with Lily exposed to the Tick virus and lying in a coma, it's up to Mel and Carter to search for the cure - but time isn't on their side. With every passing heartbeat, Mel is becoming more and more purely vampire.

Now their only choice is to split up in a race to save Lily - and to save humanity.