You can buy the books from the Friends & Enemies trilogy online on the following sites:

Online shop	Friends and Enemies	Beings in a Dream	The Fairest Star
www.amazon.co.uk - UK site
www.amazon.com - US site
www.amazon.de - German site
www.amazon.fr - French site
The Book Depository UK
Waterstones UK
www.whsmith.co.uk
www.tesco.com
Barnes and Noble US

You can also order a copy in-store at:

WH Smith
Waterstones

For those in Denmark, you can purchase the book in the following shops:

Kristian F. Møller, Store Torv 5, Aarhus
Gad Studiebogladen, Søndergade 20, Aarhus

All major bookshops in Copenhagen.