I love this book. It taught me more detail about art than GCSE and A Level art combined. It is written in an easy format to understand- no big technical words that you wouldn't have a clue about if you didn't have an archaic dictionery.
The book covers all aspects of watercolour painting:
Composition guide- (Using the 3 3rds Rule)
Thumbnails for layouts
Light then Dark painting
Step by Step process to creating an elaborate picture in an easy way
How to make your work look professional, less detail, more thought process to success
Overall, a watercolourists easy reference guide to completing hard techniques easily.
A must buy- even for beginners. I have read many Watercolour books but this one actually taught me something. How to lay out my designs and see through an Artist's Eye.