Disturbia, the fifth of the Thaumatology novels is now out.
It’s currently available from Smashwords (http://www.smashwords.com/books/view/138316), use coupon RQ83D for 50% off for the first day or so, after which it will be available under their sale using code REW50.
On Amazon look to:
When bodies start piling up under mysterious, violent circumstances, it’s up to Ceri and Lily to discover who is doing the killing. As the link between the deaths becomes clear the couple have to delve into a world Lily thought she had left behind for good, digging through the ugly underbelly of London’s night life to find a killer bent on revenge at any cost.