The books of the series are currently available
at the following UK bookshops:

 

Chicken and Frog Bookshop
Brentwood, Essex

Chicken and Frog Bookshop
  The European Bookshop
London

The European Bookshop


Waterstones
Nationwide

Waterstones
  WHSmith
Nationwide

WHSmith


Books etc.
Nationwide

Books etc.
  Amazon.co.uk
Nationwide

Amazon.co.uk