it is already out...
The third Skulduggery Pleasant novel, The Faceless Ones, was released in the US on August 25, 2009.
In the US, the book The Faceless Ones was released on August 25, 2009.
Skulduggery Pleasant is the first, Skulduggery Pleasant Playing with Fire is the second, Skulduggery Pleasant the Faceless Ones is the third, Skulduggery Pleasant Dark Days is the fourth, and Skulduggery Pleasant Mortal Coil is the fifth and newest one in the series. There is a 6th book comming out and has been rumoured to be called The Terrible Truth
Skulduggery Pleasant: Dark Days (released in April, 2010) it will be called skulduggery pleasent: dark days
The first Skulduggery Pleasant book is just called 'Skulduggery Pleasant'. It was retitled "Skulduggery Pleasant: Scepter of the Ancients" for US release.
Skulduggery Pleasant: Dark Days was released April 1, 2010.Skulduggery Pleasant 5 (Skulduggery Pleasant: Mortal Coilfollowed on September 1, 2010)
Book 1: Skulduggery Pleasant Book 2: Skulduggery Pleasant: Playing with Fire Book 3: Skulduggery Pleasant: The Faceless Ones Book 4: Skulduggery Pleasant: Dark Days Book 5: Skulduggery Pleasant: Mortal Coil The sixth book is due out in September 2011. We don't know what it's called yet.
The release date for "Skulduggery Pleasant: Kingdom Of The Wicked" was August 30, 2012 in Ireland and the UK. The book was released (early) in Australia on July 24, 2012.
The Skulduggery Pleasant book that comes after "Dark Days" is "Mortal Coil".
August 2013
Its just Skulduggery Pleasant
Skulduggery Pleasant(2007)Skulduggery Pleasant: Playing with Fire (2008)Skulduggery Pleasant: The Faceless Ones (2009)Skulduggery Pleasant: Dark Days (2010)Skulduggery Pleasant: Mortal Coil (2010)Skulduggery Pleasant: Death Bringer (2011)Skulduggery Pleasant: Kingdom of the Wicked (2012)