The first Skulduggery Pleasant book is in fact called: "Skulduggery Pleasant."
Then (in order) they go like this:
1st: Skulduggery Pleasant
2nd: Skulduggery Pleasant - Playing With Fire
3rd: Skulduggery Pleasant - The Faceless Ones
4th: Skulduggery Pleasant - Dark Days
5th: Skulduggery Pleasant - Mortal Coil
6th: Skulduggery Pleasant - The Death Bringer
September 1 in Australia, September 2 in UK
Skulduggery Pleasant: Mortal Coil was technically released on September 2, 2010. The scheduled release date was September 1.
The 4th book "Skulduggery Pleasant: Dark Days" was released on April 1, 2010, followed by the 5th book, (Mortal Coil) on September 1, 2010.
Skulduggery Pleasant: Mortal Coil (September 2nd, 2010)The comparatively short time period since Dark Days (April 1, 2010) is due to the fact that a cliff-hanger of sorts exists in the 4th book, to be resolved in the 5th book.Skulduggery Pleasant 5 is called Mortal Coil.
Skulduggery pleasant book 1 was out in 2007 Playing with fire 2008 The faceless ones 2009 Dark days 2010 mortal coil 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.
Skulduggery Pleasant Skulduggery Pleasant - Playing With Fire Skulduggery Pleasant - The Faceless Ones Skulduggery Pleasant - Dark Days Skulduggery Pleasant - Mortal Coil Skulduggery Pleasant - Death Bringer
Skulduggery Pleasant: Dark Days was released April 1, 2010.Skulduggery Pleasant 5 (Skulduggery Pleasant: Mortal Coilfollowed on September 1, 2010)
the first skullduggery pleasant book is just called skullduggery pleasant and its a sort of orange cover, the one after that is called playing with fire and its got a greeny cover, the third 1 is called the faceless ones and has a bluey cover, the forth 1 is called dark days and is full color but has a red background and the fith 1 is called mortal coil and i think is only available in hard back at the moment. there is also a sixth 1 coming out in April 2011 but i don't know anything about that 1. i hope this helps
Skulduggery Pleasant (In the USA, it is called "Scepter of the Ancients", and is the same as the regular first book in the other nations)Skulduggery Pleasant: Playing with Fire,Skulduggery Pleasant: The Faceless Ones,Skulduggery Pleasant: Dark days,Skulduggery Pleasant: Mortal Coil (September 2, 2010)(also known as Skulduggery Pleasant: The New Order or Skulduggery's Secret)Skulduggery Pleasant: Death Bringer (September 1, 2011)Skulduggery Pleasant: Kingdom of the WickedSkulduggery Pleasant: Last Stand of Dead Men (2013)
The main antagonist in "Skulduggery Pleasant" is Nefarian Serpine, a powerful sorcerer seeking to obtain immortality by finding a weapon known as the Scepter of the Ancients. He serves as a recurring threat throughout the series.
Book 4 of the Skulduggery Pleasant series is called "Dark Days".