Even though this fantastic series hasn't been published in the UK, there are still a couple of ways that you can get it and of course it is already available in the US.
International Book 1 is available through Lacey's website here which is greatly reduced from the prices on Amazon. The shipping costs will be higher for international buyers but still cheaper than Amazon.
Book 2: The Demon Kiss is available from Amazon. I have also checked Barnes and Nobel, Books-A-Million and Powells online and they all have the book available.
Susan Mann is the distributer for book 1 here in the UK and it is available at a greatly reduced rate compared to Amazon. The Trouble With Spells is available for £10 which includes P+P and there are signed copies available. You can either get in contact through her blog here or email her at email@example.com
Lynsey Newton over at UK Book Tours has a copy of the first book: The Trouble With Spells. So only a couple of people have signed up for this tour so head on over there now while the list is still short!