This seemed like a good choice - but I confess to being more than a little disappointed. The handbook that arrives with the camera is linguistically challenged - and consequently not ideal for sorting out what everything actually does. This book (a quite substantial tome on heavy art-quality paper) - I thought - would fill in some, if not all, of the missing gaps. It doesn't: it leaves much to be desired offering a wealth of information - much of it surrounded by extraneous waffle - that was for me irrelevant and which I found frustrating.
What I missed was the sub-title of the book which is "guide to digital photography" - its not really just a guide to the GF1.
If you are looking for a clear and concise explanation of each of the menu functions, how to access them and what effect they have on the results the camera can produce, which would have been ideal, then you need to look further. If instead you need the basics then you will find yourself happily ploughing through "The Panasonic GF1 comes in an impressive box filled with stuff ..... the first thing is to carefully unpack the camera ...
As a serious adjunct to the original handbook then - its pretty poor. To be honest, even as a guide for the complete beginner, it lacks suitable structure and clear guidance - delving into things that are much more adequately explained elsewhere and in a more appropriate context.