I had a bit of an online shop on Amazon and purchased the book Mark recommended above - Good stuff!
I also purchased the following book
Osprey Masterclass - Panzer Modelling
The book contains loads of fantastic photos of the authors amazing collection of panzer models, lots of information on how he constructed them and finished them and a whole host of hints and tips about superdetailing etc. A very nicely produced book with great quaility photos, hardback and Amazon currently have it for £8.50 off the RRP too!
ISBN-13: 978-1841762364
A guide to panzer modelling, covering the techniques and materials, tools, reference sources, construction and conversion methods, and artistic touches. This second edition has been brought up-to-date with developments from the manufacturers, and there are photographs of over 20 new models.